Can CBD vape help you sleep better?

CBD and THC are the most abundant cannabinoids in the cannabis plant. Both cannabinoids are psychoactive but their effects on the brain are very distinct. Unlike THC, CBD is non-intoxicating.

People vape CBD for various reasons including relieving one from pain, anxiety, and seizures. Can using a CBD vape help you sleep better? Get an in-depth answer below.

What does research say about CBD vape helping people sleep better?

In recent years the interest in CBD‘s potential benefits has grown rapidly among the public. Consequently, this growth has encouraged many researchers to study the effects of this cannabinoid.

Before you know any researcher’s findings of the best CBD vape helping you sleep better, you need to understand the causes of your sleeping poorly.

According to medical experts, poor sleep/ insomnia can be caused by:

  • Mental health disorders, including anxiety, stress, depression, and Post Traumatic Stress Disorder (PTSD)
  • Certain types of medication whose side effects include disturbing your sleep-wake cycle
  • Consuming caffeine late in the day
  • Environmental and physical factors like loud noise or sleeping on an uncomfortable bed
  • Some physical conditions

Vaping CBD can help you sleep better if your insomnia condition is caused by external factors and related conditions.

Several scientific studies have proved that CBD can help treat anxiety. In one study that was published in 2019 in the NCBI Journal, 45 subjects were experiencing anxiety and 25 of these subjects were experiencing poor sleep. The study had a total of 72 subjects and they all administered 25 mg of CBD each day in capsule form. During the first month, almost 79 percent of these subjects reported a drop in their anxiety levels. Also over 66% of the subjects reported that the CBD had helped them sleep better.

Usually, the levels of cortisol (stress hormone) peak in the morning. However, insomnia is caused by the peaking of levels at night. Researchers have found out that vaping CBD can help regulate the level of cortisol hormone in the body, helping keep it as low as possible. Consequently, using a wax pen can help relieve you from stress, which can improve your sleep.

Furthermore, pain is a major cause of sleep problems. Many people vape CBD to help them get relief from the various forms of pain, including migraines, arthritis, fibromyalgia, neuropathic pain, multiple sclerosis, and chronic pain. A majority of these people can attest that CBD works well in relieving one from pain.

Why you should try using a CBD vape when experiencing poor sleep.

In case you are undergoing poor sleep cycles, there are several methods you can use to administer CBD to help you sleep better. These methods include:

  1. Using a CBD vape
  2. Taking CBD oils and tinctures
  3. Taking CBD capsules
  4. Ingesting CBD edibles and gummies
  5. Smoking cannabis

Out of these methods, using a CBD vape stands out because of its high bioavailability. Generally, using a CBD vape is the fastest way to get CBD into your system and experience its numerous benefits. This phenomenon is because vaping enables CBD to get directly absorbed into the bloodstream via the lungs. For the other methods, CBD has to undergo other biological processes such as digestion before getting absorbed. Therefore, it takes longer to feel the CBD effect.

Bled

One may argue that smoking joints is also a highly bioavailable method like using a CBD vape. This argument is true. However, a CBD vape is healthier than smoking cannabis joints as it eliminates some toxic substances released when smoking/ combusting the cannabis concentrate. Moreover, it is easier to dose CBD with a vape than a smoking joint.

Which is the appropriate CBD dosage that can help you sleep better?

The appropriate CBD dosage for insomnia depends on several factors, including your weight, body chemistry, and the nature of your sleeping problems. There is no universal dose for vaping CBD. The CBD dose that works for some people may not work for others. Furthermore, there is no documented case of somebody who died as a result of vaping too much CBD.

Does a CBD vape have any safety concerns/ side effects?

Although the Food and Drug Administration (FDA) does not regulate CBD products, including vapes, many studies have concluded that CBD is a relatively safe treatment for various conditions, including poor sleep cycles/ insomnia. To date, there are no great side effects that were as a result of vaping CBD have been documented.

However, you should ensure your CBD vape is third-party lab tested and be sure to check out the test results

Top 10 Cross-Platform frameworks for Mobile App Development

Top 10 Cross-Platform frameworks for Mobile App Development

Mobile applications have changed businesses to a great extent. Many SMEs have created mobile apps for their business, and many more are creating it.

The most significant barrier for businesses to create a mobile application is the budget. Cross-platform frameworks have made mobile app development cost-effective.

Today, startups and SMEs choose cross-platform app development over native because of lesser development time and cost.

Using Cross-Platform Frameworks, you can launch native-like applications on different platforms like Android, iOS, Windows with a single codebase.

Hence, you can expand your reach to the targeted audience on all platforms at a much-reduced cost. To know the difference between a native and cross-platform app, refer this blog on native vs. hybrid app.

Now here we will talk about the cross-platform app frameworks or tools in a question-answer format.

What is a Cross-Platform Framework?

Cross-Platform is a kind of computer software that is useful for developing software products or services that can operate on different platforms with one code-base.

What are the best frameworks for developing cross platform mobile apps?

There are many Cross-platform frameworks available. Here is the list:

  • Ionic
  • React Native
  • Flutter
  • Xamarin
  • Adobe PhoneGap / Apache Cordova
  • Corona SDK
  • NativeScript
  • Appcelerator Titanium
  • Qt
  • Unity3D

Which framework can be used for developing Cross-Platform apps?

You can use almost all the above frameworks to create cross-platform apps.

Which are the best cross-platform frameworks for developing mobile applications?

It is tough to compare all the frameworks and choose the best without knowing mobile application requirements because each framework has its pros and cons. In most of the mobile app projects, React Native, Ionic, and Native SDKs are in use.

Which programming languages cross-platform app frameworks use?

Cross-platform app frameworks use the following languages:

  • Java
  • C++
  • JavaScript and HTML5
  • Ruby
  • C#
  • Lua

Best Cross-Platform Frameworks for Mobile App Development

1. Ionic

Ionic is a free, open-source framework for developing mobile apps and progressive web apps with ease. It is licensed under MIT.

Ionic - Best Cross-Platform App Development Framework

You can build Ionic mobile apps with any web technology that you know like Angular.JS, React.JS, Vue.JS, or HTML5.

You can launch apps on different platforms with one codebase in Ionic. Now, it has 100+ mobile-optimized React UI components.

Ionic provides a wide range of Native plugins for native features like Bluetooth, HealthKit, FingerPint, Auth, etc. You can also use Cordova/Phonegap plugins and TypeScript extensions to get more native plugins.

Ionic has a tremendous community, documentation, and demos which help you to launch your application much faster.

Here are some advantages of the Ionic mobile app framework

  • Utilizes a single codebase
  • Highly favored by expert developers
  • Quick to learn
  • Clear documentation
  • Quick prototyping

Are You Looking for Ionic Developers?

Moreover, Ionic is a complete mobile toolkit for app developers to create mobile apps.

Here are some disadvantages of the Ionic mobile app framework

  • Dependent on Plugins
  • Debugging is quite challenging
  • Security-related issues
  • Doesn’t offer Performance like native apps

2. React Native

React Native is a free and open-source mobile app framework created by Facebook.

You can create mobile applications for multiple platforms like Android, iOS, Web, and Windows, with a single code base in React Native.

React Native - Most Popular Mobile App Development Tool

React Native is an excellent combination of React and native development. React is an astonishing JavaScript library used to build user interfaces.

You can create real native apps, without compromising with the performance using React Native.

The surplus benefit of React Native is that you can use it in your existing projects as well.

Unlike native apps, it lets you see your changes very fast because of the JavaScript framework.

Various leading tech giants have chosen react native app development due to its amazing benefits.

React Native Social

React Native framework has a large number of built-in components. In case a component for your requirements does not exist, then you can search the npm registry or take the help of thousands of react-native developers’ community.

It is a Facebook supported, community-driven, best cross-platform app framework.

Here are some advantages of the React Native mobile app framework

  • Effective Handling
  • Quick Integration
  • Highly useful for building robust apps
  • Hot Reloading

If you are planning to build a budget-friendly app, then choose react-native framework for your next mobile application project.

Are You Looking for Ionic Developers?

Here are some disadvantages of the React Native mobile app framework

  • Depend on third-party components
  • Require help from native developers
  • Less security

3. Flutter

Flutter is yet another free and open-source UI software development kit by Google.

Flutter lets you develop apps for Android, iOS, Windows, Mac, Linux, Google Fuchsia, and web platforms from a single code base.

It uses Dart’s native compilers to compile Flutter code in the Native ARM machine code.

Hot Reload is a great feature that helps in experiments, building UI, fixing bugs, and adding new features. It gives a faster development time with hot reloading.

You can use Flutter’s built-in components like Cupertino widgets, motion APIs, material design, etc. to deliver an astounding user experience on your mobile app.

Flutter delivers the full native experience on Android and iOS apps with its widgets.

Google and its community members do further Flutter development.

Here are some advantages of the Flutter mobile app framework

  • Quick App development
  • Easy-to-use UI
  • Wide range of widgets libraries
  • Responsive
  • Brief documentation
  • Best for MVP App Development

“Google Ads, Hamilton Musical, and Alibaba eCommerce are some of the famous names that have used Flutter as their preferred framework.”

Want to Build a Flutter Application?

Here are some disadvantages of the Flutter mobile app framework

  • Flutter has limited TV Support
  • Doesn’t offer a look & feel like native apps
  • Limited Libraries

4. Xamarin

Xamarin is also a free, open-source cross-platform app framework.

Developers can build native Android, iOS, tvOS, WatchOS, macOS, and Windows apps using .NET and C#.

Xamarin is made up of world-class tools, libraries, and programming languages.

.NET is a reliable framework that has been used by worldwide enterprise businesses.

Xamarin allows you to share 75% code across different platforms to make your development faster. But it further depends on functionality, features, developer’s experience, complexity, etc. To know more, check out this quick guide on app development timeline.

Xamarin.Forms, which is a mobile UI framework, helps you to deliver a consistent look across all platforms and platform-specific looks in no time.

You can also use Microsoft Azure along with Xamarin tools for hosting mobile app backend, database, or using intelligent services.

Here are some advantages of the Xamarin mobile app framework

  • A huge community of developers
  • Single Tech Stack for Quick Development
  • Widely used by startups and SMEs
  • Offers Native APIs and NuGet Packages

Here are some disadvantages of the Xamarin mobile app framework

  • Pricey for enterprises
  • Not suitable for high-quality graphics apps
  • Limited open-source libraries

5. Adobe PhoneGap / Apache Cordova

PhoneGap is an open-source, cross-platform framework, created by Adobe Cordova’s team.

To create an app in PhoneGap, you should have web development skills like HTML, CSS, and JavaScript.

An app created in PhoneGap supports all mobile app platforms like Android, iPhone, and Windows. You can create all the apps from a single codebase.

PhoneGap has a large and robust developer community and a complete PhoneGap toolset, which extends the capability of your app and makes your mobile app development faster.

Debugging is very easy with popular web inspectors tools in each browser.

There is no need to maintain native SDKs, and this makes compilation easier.

If you do not have expertise in commands, then you can use the PhoneGap Desktop App, which will make your work easier.

Besides this, you can also reach out to a PhoneGap App Development Company, they can deliver you a cross-platform app as per your business requirements.

It is the best cross-platform mobile app tool for mobile app developers to create hybrid applications.

Here are some advantages of the Adobe PhoneGap mobile app framework

  • Developers can share the app with the team to obtain feedback
  • Provides a cloud solution allowing mobile app developers to build apps directly
  • Well-suited with various third-party tools and APIs

Here are some disadvantages of the Adobe PhoneGap mobile app framework

  • Not suggested for making complex and high-performing graphics apps
  • Relies on iOS SDKs

6. Corona SDK

Corona - 2D/3D App Development Tool

Corona is a powerful tool to create 2D games & apps for Android, iOS, Kindle, Apple TV, Android TV, macOS, and Windows.

It is a free and single codebase SDK developed by Corona Labs in mid-2009.

This mobile app framework is using Lua, which is a very lightweight and fast programming language.

Programmers often use Lua in game development. Popular games like Angry Bird, Warcraft, Civilization, and many more are using this leading scripting language.

Corona also has a library for plugins to extend the features of your hybrid app. You can also call a native library or API in Corona if the plugin suitable to your needs is not available in the Corona library.

“Corona is optimized for performance and stability.”

Corona has a fantastic community of more than 50,000 developers and a marketplace full of project templates, music/sound effects, and graphics for your game or hybrid mobile app projects.

They have their slack channel and email for providing priority support.

Here are some advantages of the Corona SDK mobile app framework

  • Require a developer to write code only once
  • Minimum lag
  • Quick to learn and implement

Here are some disadvantages of the Corona SDK mobile app framework

  • Expensive to use
  • No option to include native plugins

7. NativeScript

NativeScript is one of the most well-known cross-platform frameworks useful for developing truly native mobile apps for Android and iOS platforms.

Developers can use Angular, Vue.js, TypeScript, or JavaScript for building cross-platform apps.

As it is an open-source framework, developers can adjust the user interface for multiple screens & devices and also utilize dependencies such as Cocoapods, Maven, npm.js, etc.

Here are some advantages of the NativeScript mobile app framework

  • Easy to learn.
  • Code reusability.
  • It has a huge community of enthusiastic and active developers.
  • NativeScript offers extensive plugins, templates, and app samples on its marketplace.
  • Supports hot reloading.

Here are some disadvantages of the NativeScript mobile app framework

  • All the things are running on one thread.
  • Performance issues.
  • Live sync is not available.

8. Appcelerator Titanium

Titanium SDK is an open-source, cross-platform framework created by Appcelerator.

Appcelerator Titanium - A Tool for Premium Mobile App Development

It is not entirely free. It has three pricing plans: Indie for a single developer, Pro for growing the mobile business, and Enterprise for customizable setup & enterprise-scale companies.

It allows you to create native apps on different platforms like Android, iOS, Windows from a single codebase like other cross-platform frameworks.

It provides all the facilities from building to maintaining the application. You can check app analytics like usage, crashes, etc. in this tool.

This tool also provides Hyperloop to connect any native API and API builder to build APIs with cloud service.

Many big brands have chosen this technology to build rich and engaging mobile applications.

They have comprehensive assets to learn app development with Appcelerator.

Here are some advantages of the Appcelerator Titanium mobile app framework

  • Quick prototyping
  • Increasing Community of Developers
  • Uses JavaScript-based SDK
  • Consists of various pre-built components

Here are some disadvantages of the Appcelerator Titanium mobile app framework

  • Highly complex to build apps
  • Poor documentation

9. Qt

Qt is a free and open-source toolkit pronounced as “cute.”

QT - Hybrid Mobile App Development Framework

It allows you to create graphics UI and cross-platform applications which are compatible with all platforms like Android, iOS, and operating systems like Linux, macOS, Windows.

Applications developed using Qt are native applications with native features and speed.

You can launch an application on different platforms with little or no change in the codebase.

Qt provides tools for the entire cycle of application development, design tools to create prototype and design, development tools to develop and test apps and deploy tools to launch the app on different platforms.

Many big brands like Mercedes-Benz, LG, PEUGEOT, etc. are using Qt for their software.

It is available under both open-source and commercial licenses.

Here are some advantages of the Qt mobile app framework

  • Awesome documentation
  • Great community; hence, you can get answers to questions quickly
  • Stable on a vast number of platforms
  • Mature Framework

Here are some disadvantages of the Qt mobile app framework

  • Performance issues
  • Limited libraries
  • Purchase commercial version to get more features

10. Unity3D

Unity Technologies created this incredible cross-platform game engine.

You can use Unity 3D to create 2D & 3D games, VR & AR games, and other experiences. It supports more than 25 platforms like Android, iOS, Xbox, PlayStation, Linux, Oculus Rift, Google Cardboard, etc.

This engine has been adopted by significant industries like film, automotive, engineering, architecture, construction, and video gaming.

Unity has complete resources for learning to advance skills, assets to make development faster, documentation to create and use scripts, and support to access the right resources at the right time.

Here are some advantages of the Unity 3D mobile app framework

  • Excellent Community of Developers.
  • Simpler to develop games as compared to other game engines.
  • Even though it’s not open-source, it is affordable.
  • One of the best visual platforms available in the market.

Here are some disadvantages of the Unity 3D mobile app framework

  • Documentation of several features is outdated.
  • Unity 3D Pro doesn’t offer full features on mobile. Hence, you have to make enough investment to obtain Mobile Pro Licenses.
  • Until Unity 5.0 engine works on 32-bit. Hence, there are strong chances that the editor gets crashed when the system runs out of memory. Also, Unity 3D is not feasible to build AAA games.

Conclusion: We have learned what are the best crossplatform development frameworks.

You can reach us at Guru Technologies

Dewey Decimal Clasification (DDC) Summary

DDC is a universal scheme and is able to classify books in all branches of knowledge. It treats the whole knowledge as unity and divides it in 10 exclusive Main Classes

These 10 classes denoted by decimal numbers 0 to 9

      0          Computer science, information & general works   
1 Philosophy & psychology
2 Religion
3 Social sciences
4 Language
5 Science
6 Technology
7 Arts & recreation
8 Literature
9 History & geography

 

To simplify these ordinal values of three decimal fractions and for their arrangement, there is a convention that no number in DDC shall comprise less that 3 digits.

If any number is of less than 3 digits then add required number of 0’s to make number 3 digits.

so above 10 main classes are classified as below

      000          Computer science, information & general works   
100 Philosophy & psychology
200 Religion
300 Social sciences
400 Language
500 Science
600 Technology
700 Arts & recreation
800 Literature
900 History & geography

 

Second Summary

000 Computer science, knowledge & systems
010->Bibliographies
020->Library & information sciences
030->Encyclopedias & books of facts
040->[Unassigned]
050->Magazines, journals & serials
060->Associations, organizations & museums
070->News media, journalism & publishing
080->Quotations
090->Manuscripts & rare books
100->Philosophy
110->Metaphysics
120->Epistemology
130->Parapsychology & occultism
140->Philosophical schools of thought
150->Psychology
160->Logic
170->Ethics
180->Ancient, medieval & eastern philosophy
190->Modern western philosophy
200->Religion
210->Philosophy & theory of religion
220->The Bible
230->Christianity & Christian theology
240->Christian practice & observance
250->Christian pastoral practice & religious orders
260->Christian organization, social work & worship
270->History of Christianity
280->Christian denominations
290->Other religions
300->Social sciences, sociology & anthropology
310->Statistics
320->Political science
330->Economics
340->Law
350->Public administration & military science
360->Social problems & social services
370->Education
380->Commerce, communications & transportation
390->Customs, etiquette & folklore
400->Language
410->Linguistics
420->English & Old English languages
430->German & related languages
440->French & related languages
450->Italian, Romanian & related languages
460->Spanish & Portuguese languages
470->Latin & Italic languages
480->Classical & modern Greek languages
490->Other languages

500->Science
510->Mathematics
520->Astronomy
530->Physics
540->Chemistry
550->Earth sciences & geology
560->Fossils & prehistoric life
570->Life sciences; biology
580->Plants (Botany)
590->Animals (Zoology)
600->Technology
610->Medicine & health
620->Engineering
630->Agriculture
640->Home & family management
650->Management & public relations
660->Chemical engineering
670->Manufacturing
680->Manufacture for specific uses
690->Building & construction
700->Arts
710->Landscaping & area planning
720->Architecture
730->Sculpture, ceramics & metalwork
740->Drawing & decorative arts
750->Painting
760->Graphic arts
770->Photography & computer art
780->Music
790->Sports, games & entertainment
800->Literature, rhetoric & criticism
810->American literature in English
820->English & Old English literatures
830->German & related literatures
840->French & related literatures
850->Italian, Romanian & related literatures
860->Spanish & Portuguese literatures
870->Latin & Italic literatures
880->Classical & modern Greek literatures
890->Other literatures
900->History
910->Geography & travel
920->Biography & genealogy
930->History of ancient world (to ca. 499)
940->History of Europe
950->History of Asia
960->History of Africa
970->History of North America
980->History of South America
990->History of other areas

 

Third Summary

000 -> Computer science, information & general works
001 -> Knowledge
002 -> The book
003 -> Systems
004 -> Data processing & computer science
005 -> Computer programming, programs & data
006 -> Special computer methods
007 -> [Unassigned]
008 -> [Unassigned]
009 -> [Unassigned]
010 -> Bibliography
011 -> Bibliographies
012 -> Bibliographies of individuals
013 -> [Unassigned]
014 -> Of anonymous & pseudonymous works
015 -> Bibliographies of works from specific places
016 -> Bibliographies of works on specific subjects
017 -> General subject catalogs
018 -> Catalogs arranged by author, date, etc.
019 -> Dictionary catalogs
020 -> Library & information sciences
021 -> Library relationships
022 -> Administration of physical plant
023 -> Personnel management
024 -> [Unassigned]
025 -> Library operations
026 -> Libraries for specific subjects
027 -> General libraries
028 -> Reading & use of other information media
029 -> [Unassigned]
030 -> General encyclopedic works
031 -> Encyclopedias in American English
032 -> Encyclopedias in English
033 -> In other Germanic languages
034 -> Encyclopedias in French, Occitan & Catalan
035 -> In Italian, Romanian & related languages
036 -> Encyclopedias in Spanish & Portuguese
037 -> Encyclopedias in Slavic languages
038 -> Encyclopedias in Scandinavian languages
039 -> Encyclopedias in other languages
040 -> [Unassigned]
041 -> [Unassigned]
042 -> [Unassigned]
043 -> [Unassigned]
044 -> [Unassigned]
045 -> [Unassigned]
046 -> [Unassigned]
047 -> [Unassigned]
048 -> [Unassigned]
049 -> [Unassigned]
050 -> General serial publications
051 -> Serials in American English
052 -> Serials in English
053 -> Serials in other Germanic languages
054 -> Serials in French, Occitan & Catalan
055 -> In Italian, Romanian & related languages
056 -> Serials in Spanish & Portuguese
057 -> Serials in Slavic languages
058 -> Serials in Scandinavian languages
059 -> Serials in other languages
060 -> General organizations & museum science
061 -> Organizations in North America
062 -> Organizations in British Isles; in England
063 -> Organizations in central Europe; in Germany
064 -> Organizations in France & Monaco
065 -> Organizations in Italy & adjacent islands
066 -> In Iberian Peninsula & adjacent islands
067 -> Organizations in eastern Europe; in Russia
068 -> Organizations in other geographic areas
069 -> Museum science
070 -> News media, journalism & publishing
071 -> Newspapers in North America
072 -> Newspapers in British Isles; in England
073 -> Newspapers in central Europe; in Germany
074 -> Newspapers in France & Monaco
075 -> Newspapers in Italy & adjacent islands
076 -> In Iberian Peninsula & adjacent islands
077 -> Newspapers in eastern Europe; in Russia
078 -> Newspapers in Scandinavia
079 -> Newspapers in other geographic areas
080 -> General collections
081 -> Collections in American English
082 -> Collections in English
083 -> Collections in other Germanic languages
084 -> Collections in French, Occitan & Catalan
085 -> In Italian, Romanian & related languages
086 -> Collections in Spanish & Portuguese
087 -> Collections in Slavic languages
088 -> Collections in Scandinavian languages
089 -> Collections in other languages
090 -> Manuscripts & rare books
091 -> Manuscripts
092 -> Block books
093 -> Incunabula
094 -> Printed books
095 -> Books notable for bindings
096 -> Books notable for illustrations
097 -> Books notable for ownership or origin
098 -> Prohibited works, forgeries & hoaxes
099 -> Books notable for format

 

100

100 -> Philosophy & psychology
101 -> Theory of philosophy
102 -> Miscellany
103 -> Dictionaries & encyclopedias
104 -> [Unassigned]
105 -> Serial publications
106 -> Organizations & management
107 -> Education, research & related topics
108 -> Kinds of persons treatment
109 -> Historical & collected persons treatment
110 -> Metaphysics
111 -> Ontology
112 -> [Unassigned]
113 -> Cosmology
114 -> Space
115 -> Time
116 -> Change
117 -> Structure
118 -> Force & energy
119 -> Number & quantity
120 -> Epistemology, causation & humankind
121 -> Epistemology
122 -> Causation
123 -> Determinism & indeterminism
124 -> Teleology
125 -> [Unassigned]
126 -> The self
127 -> The unconscious & the subconscious
128 -> Humankind
129 -> Origin & destiny of individual souls
130 -> Parapsychology & occultism
131 -> Parapsychological & occult methods
132 -> [Unassigned]
133 -> Specific topics in parapsychology & occultism
134 -> [Unassigned]
135 -> Dreams & mysteries
136 -> [Unassigned]
137 -> Divinatory graphology
138 -> Physiognomy
139 -> Phrenology
140 -> Specific philosophical schools
141 -> Idealism & related systems
142 -> Critical philosophy
143 -> Bergsonism & intuitionism
144 -> Humanism & related systems
145 -> Sensationalism
146 -> Naturalism & related systems
147 -> Pantheism & related systems
148 -> Eclecticism, liberalism & traditionalism
149 -> Other philosophical systems
150 -> Psychology
151 -> [Unassigned]
152 -> Perception, movement, emotions & drives
153 -> Mental processes & intelligence
154 -> Subconscious & altered states
155 -> Differential & developmental psychology
156 -> Comparative psychology
157 -> [Unassigned]
158 -> Applied psychology
159 -> [Unassigned]
160 -> Logic
161 -> Induction
162 -> Deduction
163 -> [Unassigned]
164 -> [Unassigned]
165 -> Fallacies & sources of error
166 -> Syllogisms
167 -> Hypotheses
168 -> Argument & persuasion
169 -> Analogy
170 -> Ethics
171 -> Ethical systems
172 -> Political ethics
173 -> Ethics of family relationships
174 -> Occupational ethics
175 -> Ethics of recreation & leisure
176 -> Ethics of sex & reproduction
177 -> Ethics of social relations
178 -> Ethics of consumption
179 -> Other ethical norms
180 -> Ancient, medieval & eastern philosophy
181 -> Eastern philosophy
182 -> Pre-Socratic Greek philosophies
183 -> Socratic & related philosophies
184 -> Platonic philosophy
185 -> Aristotelian philosophy
186 -> Skeptic & Neoplatonic philosophies
187 -> Epicurean philosophy
188 -> Stoic philosophy
189 -> Medieval western philosophy
190 -> Modern western philosophy
191 -> Philosophy of United States & Canada
192 -> Philosophy of British Isles
193 -> Philosophy of Germany & Austria
194 -> Philosophy of France
195 -> Philosophy of Italy
196 -> Philosophy of Spain & Portugal
197 -> Philosophy of former Soviet Union
198 -> Philosophy of Scandinavia
199 -> Philosophy in other geographic areas

200

200 -> Religion
201 -> Religious mythology & social theology
202 -> Doctrines
203 -> Public worship & other practices
204 -> Religious experience, life & practice
205 -> Religious ethics
206 -> Leaders & organization
207 -> Missions & religious education
208 -> Sources
209 -> Sects & reform movements
210 -> Philosophy & theory of religion
211 -> Concepts of God
212 -> Existence, know ability & attributes of God
213 -> Creation
214 -> Theodicy
215 -> Science & religion
216 -> [Unassigned]
217 -> [Unassigned]
218 -> Humankind
219 -> [Unassigned]
220 -> Bible
221 -> Old Testament (Tanakh)
222 -> Historical books of Old Testament
223 -> Poetic books of Old Testament
224 -> Prophetic books of Old Testament
225 -> New Testament
226 -> Gospels & Acts
227 -> Epistles
228 -> Revelation (Apocalypse)
229 -> Apocrypha & pseudepigrapha
230 -> Christianity & Christian theology
231 -> God
232 -> Jesus Christ & his family
233 -> Humankind
234 -> Salvation & grace
235 -> Spiritual beings
236 -> Eschatology
237 -> [Unassigned]
238 -> Creeds & catechisms
239 -> Apologetics & polemics
240 -> Christian moral & devotional theology
241 -> Christian ethics
242 -> Devotional literature
243 -> Evangelistic writings for individuals
244 -> [Unassigned]
245 -> [Unassigned]
246 -> Use of art in Christianity
247 -> Church furnishings & articles
248 -> Christian experience, practice & life
249 -> Christian observances in family life
250 -> Christian orders & local church
251 -> Preaching
252 -> Texts of sermons
253 -> Pastoral office & work
254 -> Parish administration
255 -> Religious congregations & orders
256 -> [Unassigned]
257 -> [Unassigned]
258 -> [Unassigned]
259 -> Pastoral care of families & kinds of persons
260 -> Social & ecclesiastical theology
261 -> Social theology
262 -> Ecclesiology
263 -> Days, times & places of observance
264 -> Public worship
265 -> Sacraments, other rites & acts
266 -> Missions
267 -> Associations for religious work
268 -> Religious education
269 -> Spiritual renewal
270 -> History of Christianity & Christian church
271 -> Religious orders in church history
272 -> Persecutions in church history
273 -> Doctrinal controversies & heresies
274 -> History of Christianity in Europe
275 -> History of Christianity in Asia
276 -> History of Christianity in Africa
277 -> History of Christianity in North America
278 -> History of Christianity in South America
279 -> History of Christianity in other areas
280 -> Christian denominations & sects
281 -> Early church & Eastern churches
282 -> Roman Catholic Church
283 -> Anglican churches
284 -> Protestants of Continental origin
285 -> Presbyterian, Reformed & Congregational
286 -> Baptist, Disciples of Christ & Adventist
287 -> Methodist & related churches
288 -> [Unassigned]
289 -> Other denominations & sects
290 -> Other religions
291 -> [Unassigned]
292 -> Greek & Roman religion
293 -> Germanic religion
294 -> Religions of Indic origin
295 -> Zoroastrianism
296 -> Judaism
297 -> Islam, Babism & Bahai Faith
298 -> (Optional number)
299 -> Religions not provided for elsewhere

300

300 -> Social sciences
301 -> Sociology & anthropology
302 -> Social interaction
303 -> Social processes
304 -> Factors affecting social behavior
305 -> Social groups
306 -> Culture & institutions
307 -> Communities
308 -> [Unassigned]
309 -> [Unassigned]
310 -> Collections of general statistics
311 -> [Unassigned]
312 -> [Unassigned]
313 -> [Unassigned]
314 -> General statistics of Europe
315 -> General statistics of Asia
316 -> General statistics of Africa
317 -> General statistics of North America
318 -> General statistics of South America
319 -> General statistics of other areas
320 -> Political science
321 -> Systems of governments & states
322 -> Relation of state to organized groups
323 -> Civil & political rights
324 -> The political process
325 -> International migration & colonization
326 -> Slavery & emancipation
327 -> International relations
328 -> The legislative process
329 -> [Unassigned]
330 -> Economics
331 -> Labor economics
332 -> Financial economics
333 -> Economics of land & energy
334 -> Cooperatives
335 -> Socialism & related systems
336 -> Public finance
337 -> International economics
338 -> Production
339 -> Macroeconomics & related topics
340 -> Law
341 -> Law of nations
342 -> Constitutional & administrative law
343 -> Military, tax, trade & industrial law
344 -> Labor, social, education & cultural law
345 -> Criminal law
346 -> Private law
347 -> Civil procedure & courts
348 -> Laws, regulations & cases
349 -> Law of specific jurisdictions & areas
350 -> Public administration & military science
351 -> Public administration
352 -> General considerations of public administration
353 -> Specific fields of public administration
354 -> Administration of economy & environment
355 -> Military science
356 -> Infantry forces & warfare
357 -> Mounted forces & warfare
358 -> Air & other specialized forces
359 -> Sea forces & warfare
360 -> Social problems & services; associations
361 -> Social problems & social welfare in general
362 -> Social welfare problems & services
363 -> Other social problems & services
364 -> Criminology
365 -> Penal & related institutions
366 -> Associations
367 -> General clubs
368 -> Insurance
369 -> Miscellaneous kinds of associations
370 -> Education
371 -> Schools & their activities; special education
372 -> Elementary education
373 -> Secondary education
374 -> Adult education
375 -> Curricula
376 -> [Unassigned]
377 -> [Unassigned]
378 -> Higher education
379 -> Public policy issues in education
380 -> Commerce, communications & transportation
381 -> Commerce
382 -> International commerce
383 -> Postal communication
384 -> Communications; telecommunication
385 -> Railroad transportation
386 -> Inland waterway & ferry transportation
387 -> Water, air & space transportation
388 -> Transportation; ground transportation
389 -> Metrology & standardization
390 -> Customs, etiquette & folklore
391 -> Costume & personal appearance
392 -> Customs of life cycle & domestic life
393 -> Death customs
394 -> General customs
395 -> Etiquette (Manners)
396 -> [Unassigned]
397 -> [Unassigned]
398 -> Folklore
399 -> Customs of war & diplomacy

 

400

400 -> Language
401 -> Philosophy & theory
402 -> Miscellany
403 -> Dictionaries & encyclopedias
404 -> Special topics
405 -> Serial publications
406 -> Organizations & management
407 -> Education, research & related topics
408 -> Kinds of persons treatment
409 -> Geographic & persons treatment
410 -> Linguistics
411 -> Writing systems
412 -> Etymology
413 -> Dictionaries
414 -> Phonology & phonetics
415 -> Grammar
416 -> [Unassigned]
417 -> Dialectology & historical linguistics
418 -> Standard usage & applied linguistics
419 -> Sign languages
420 -> English & Old English
421 -> English writing system & phonology
422 -> English etymology
423 -> English dictionaries
424 -> [Unassigned]
425 -> English grammar
426 -> [Unassigned]
427 -> English language variations
428 -> Standard English usage
429 -> Old English (Anglo-Saxon)
430 -> Germanic languages; German
431 -> German writing systems & phonology
432 -> German etymology
433 -> German dictionaries
434 -> [Unassigned]
435 -> German grammar
436 -> [Unassigned]
437 -> German language variations
438 -> Standard German usage
439 -> Other Germanic languages
440 -> Romance languages; French
441 -> French writing systems & phonology
442 -> French etymology
443 -> French dictionaries
444 -> [Unassigned]
445 -> French grammar
446 -> [Unassigned]
447 -> French language variations
448 -> Standard French usage
449 -> Occitan & Catalan
450 -> Italian, Romanian & related languages
451 -> Italian writing systems & phonology
452 -> Italian etymology
453 -> Italian dictionaries
454 -> [Unassigned]
455 -> Italian grammar
456 -> [Unassigned]
457 -> Italian language variations
458 -> Standard Italian usage
459 -> Romanian & related languages
460 -> Spanish & Portuguese languages
461 -> Spanish writing systems & phonology
462 -> Spanish etymology
463 -> Spanish dictionaries
464 -> [Unassigned]
465 -> Spanish grammar
466 -> [Unassigned]
467 -> Spanish language variations
468 -> Standard Spanish usage
469 -> Portuguese
470 -> Italic languages; Latin
471 -> Classical Latin writing & phonology
472 -> Classical Latin etymology
473 -> Classical Latin dictionaries
474 -> [Unassigned]
475 -> Classical Latin grammar
476 -> [Unassigned]
477 -> Old, postclassical & Vulgar Latin
478 -> Classical Latin usage
479 -> Other Italic languages
480 -> Hellenic languages; classical Greek
481 -> Classical Greek writing & phonology
482 -> Classical Greek etymology
483 -> Classical Greek dictionaries
484 -> [Unassigned]
485 -> Classical Greek grammar
486 -> [Unassigned]
487 -> Preclassical & postclassical Greek
488 -> Classical Greek usage
489 -> Other Hellenic languages
490 -> Other languages
491 -> East Indo-European & Celtic languages
492 -> Afro-Asiatic languages; Semitic languages
493 -> Non-Semitic Afro-Asiatic languages
494 -> Altaic, Uralic, Hyperborean & Dravidian
495 -> Languages of East & Southeast Asia
496 -> African languages
497 -> North American native languages
498 -> South American native languages
499 -> Austronesian & other languages

 

500

500 -> Natural sciences & mathematics
501 -> Philosophy & theory
502 -> Miscellany
503 -> Dictionaries & encyclopedias
504 -> [Unassigned]
505 -> Serial publications
506 -> Organizations & management
507 -> Education, research & related topics
508 -> Natural history
509 -> Historical, geographic & persons treatment
510 -> Mathematics
511 -> General principles of mathematics
512 -> Algebra
513 -> Arithmetic
514 -> Topology
515 -> Analysis
516 -> Geometry
517 -> [Unassigned]
518 -> Numerical analysis
519 -> Probabilities & applied mathematics
520 -> Astronomy & allied sciences
521 -> Celestial mechanics
522 -> Techniques, equipment & materials
523 -> Specific celestial bodies & phenomena
524 -> [Unassigned]
525 -> Earth (Astronomical geography)
526 -> Mathematical geography
527 -> Celestial navigation
528 -> Ephemerides
529 -> Chronology
530 -> Physics
531 -> Classical mechanics; solid mechanics
532 -> Fluid mechanics; liquid mechanics
533 -> Gas mechanics
534 -> Sound & related vibrations
535 -> Light & infrared & ultraviolet phenomena
536 -> Heat
537 -> Electricity & electronics
538 -> Magnetism
539 -> Modern physics
540 -> Chemistry & allied sciences
541 -> Physical chemistry
542 -> Techniques, equipment & materials
543 -> Analytical chemistry
544 -> [Unassigned]
545 -> [Unassigned]
546 -> Inorganic chemistry
547 -> Organic chemistry
548 -> Crystallography
549 -> Mineralogy
550 -> Earth sciences
551 -> Geology, hydrology & meteorology
552 -> Petrology
553 -> Economic geology
554 -> Earth sciences of Europe
555 -> Earth sciences of Asia
556 -> Earth sciences of Africa
557 -> Earth sciences of North America
558 -> Earth sciences of South America
559 -> Earth sciences of other areas
560 -> Paleontology; paleozoology
561 -> Paleobotany; fossil microorganisms
562 -> Fossil invertebrates
563 -> Fossil marine & seashore invertebrates
564 -> Fossil mollusks & molluscoids
565 -> Fossil arthropods
566 -> Fossil chordates
567 -> Fossil cold-blooded vertebrates; fossil fishes
568 -> Fossil birds
569 -> Fossil mammals
570 -> Life sciences; biology
571 -> Physiology & related subjects
572 -> Biochemistry
573 -> Specific physiological systems in animals
574 -> [Unassigned]
575 -> Specific parts of & systems in plants
576 -> Genetics & evolution
577 -> Ecology
578 -> Natural history of organisms
579 -> Microorganisms, fungi & algae
580 -> Plants (Botany)
581 -> Specific topics in natural history
582 -> Plants noted for characteristics & flowers
583 -> Dicotyledons
584 -> Monocotyledons
585 -> Gymnosperms; conifers
586 -> Seedless plants
587 -> Vascular seedless plants
588 -> Bryophytes
589 -> [Unassigned]
590 -> Animals (Zoology)
591 -> Specific topics in natural history
592 -> Invertebrates
593 -> Marine & seashore invertebrates
594 -> Mollusks & molluscoids
595 -> Arthropods
596 -> Chordates
597 -> Cold-blooded vertebrates; fishes
598 -> Birds
599 -> Mammals

 

600

600 -> Technology
601 -> Philosophy & theory
602 -> Miscellany
603 -> Dictionaries & encyclopedias
604 -> Special topics
605 -> Serial publications
606 -> Organizations
607 -> Education, research & related topics
608 -> Inventions & patents
609 -> Historical, geographic & persons treatment
610 -> Medicine & health
611 -> Human anatomy, cytology & histology
612 -> Human physiology
613 -> Personal health & safety
614 -> Incidence & prevention of disease
615 -> Pharmacology & therapeutics
616 -> Diseases
617 -> Surgery & related medical specialties
618 -> Gynecology, obstetrics, pediatrics & geriatrics
619 -> [Unassigned]
620 -> Engineering & allied operations
621 -> Applied physics
622 -> Mining & related operations
623 -> Military & nautical engineering
624 -> Civil engineering
625 -> Engineering of railroads & roads
626 -> [Unassigned]
627 -> Hydraulic engineering
628 -> Sanitary & municipal engineering
629 -> Other branches of engineering
630 -> Agriculture & related technologies
631 -> Techniques, equipment & materials
632 -> Plant injuries, diseases & pests
633 -> Field & plantation crops
634 -> Orchards, fruits & forestry
635 -> Garden crops (Horticulture)
636 -> Animal husbandry
637 -> Processing dairy & related products
638 -> Insect culture
639 -> Hunting, fishing & conservation
640 -> Home & family management
641 -> Food & drink
642 -> Meals & table service
643 -> Housing & household equipment
644 -> Household utilities
645 -> Household furnishings
646 -> Sewing, clothing & personal living
647 -> Management of public households
648 -> Housekeeping
649 -> Child rearing & home care of persons
650 -> Management & auxiliary services
651 -> Office services
652 -> Processes of written communication
653 -> Shorthand
654 -> [Unassigned]
655 -> [Unassigned]
656 -> [Unassigned]
657 -> Accounting
658 -> General management
659 -> Advertising & public relations
660 -> Chemical engineering
661 -> Industrial chemicals
662 -> Explosives, fuels & related products
663 -> Beverage technology
664 -> Food technology
665 -> Industrial oils, fats, waxes & gases
666 -> Ceramic & allied technologies
667 -> Cleaning, color & coating technologies
668 -> Technology of other organic products
669 -> Metallurgy
670 -> Manufacturing
671 -> Metalworking & primary metal products
672 -> Iron, steel & other iron alloys
673 -> Nonferrous metals
674 -> Lumber processing, wood products & cork
675 -> Leather & fur processing
676 -> Pulp & paper technology
677 -> Textiles
678 -> Elastomers & elastomer products
679 -> Other products of specific materials
680 -> Manufacture for specific uses
681 -> Precision instruments & other devices
682 -> Small forge work (Blacksmithing)
683 -> Hardware & household appliances
684 -> Furnishings & home workshops
685 -> Leather, fur goods & related products
686 -> Printing & related activities
687 -> Clothing & accessories
688 -> Other final products & packaging
689 -> [Unassigned]
690 -> Buildings
691 -> Building materials
692 -> Auxiliary construction practices
693 -> Specific materials & purposes
694 -> Wood construction & carpentry
695 -> Roof covering
696 -> Utilities
697 -> Heating, ventilating & air-conditioning
698 -> Detail finishing
699 -> [Unassigned]

 

700

700 -> The arts; fine & decorative arts
701 -> Philosophy of fine & decorative arts
702 -> Miscellany of fine & decorative arts
703 -> Dictionaries of fine & decorative arts
704 -> Special topics in fine & decorative arts
705 -> Serial publications of fine & decorative arts
706 -> Organizations & management
707 -> Education, research & related topics
708 -> Galleries, museums & private collections
709 -> Historical, geographic & persons treatment
710 -> Civic & landscape art
711 -> Area planning
712 -> Landscape architecture
713 -> Landscape architecture of traffic ways
714 -> Water features
715 -> Woody plants
716 -> Herbaceous plants
717 -> Structures in landscape architecture
718 -> Landscape design of cemeteries
719 -> Natural landscapes
720 -> Architecture
721 -> Architectural structure
722 -> Architecture to ca. 300
723 -> Architecture from ca. 300 to 1399
724 -> Architecture from 1400
725 -> Public structures
726 -> Buildings for religious purposes
727 -> Buildings for education & research
728 -> Residential & related buildings
729 -> Design & decoration
730 -> Plastic arts; sculpture
731 -> Processes, forms & subjects of sculpture
732 -> Sculpture to ca. 500
733 -> Greek, Etruscan & Roman sculpture
734 -> Sculpture from ca. 500 to 1399
735 -> Sculpture from 1400
736 -> Carving & carvings
737 -> Numismatics & Bibliography
738 -> Ceramic arts
739 -> Art metalwork
740 -> Drawing & decorative arts
741 -> Drawing & drawings
742 -> Perspective
743 -> Drawing & drawings by subject
744 -> [Unassigned]
745 -> Decorative arts
746 -> Textile arts
747 -> Interior decoration
748 -> Glass
749 -> Furniture & accessories
750 -> Painting & paintings
751 -> Techniques, equipment, materials & forms
752 -> Color
753 -> Symbolism, allegory, mythology & legend
754 -> Genre paintings
755 -> Religion
756 -> [Unassigned]
757 -> Human figures
758 -> Other subjects
759 -> Historical, geographic & persons treatment
760 -> Graphic arts; printmaking & prints
761 -> Relief processes (Block printing)
762 -> [Unassigned]
763 -> Lithographic processes
764 -> Chromolithography & serigraphy
765 -> Metal engraving
766 -> Mezzotinting, aquatinting & related processes
767 -> Etching & drypoint
768 -> [Unassigned]
769 -> Prints
770 -> Photography, photographs & computer art
771 -> Techniques, equipment & materials
772 -> Metallic salt processes
773 -> Pigment processes of printing
774 -> Holography
775 -> Digital photography
776 -> Computer art (Digital art)
777 -> [Unassigned]
778 -> Fields & kinds of photography
779 -> Photographs
780 -> Music
781 -> General principles & musical forms
782 -> Vocal music
783 -> Music for single voices; the voice
784 -> Instruments & instrumental ensembles
785 -> Ensembles with one instrument per part
786 -> Keyboard & other instruments
787 -> Stringed instruments
788 -> Wind instruments
789 -> (Optional number)
790 -> Recreational & performing arts
791 -> Public performances
792 -> Stage presentations
793 -> Indoor games & amusements
794 -> Indoor games of skill
795 -> Games of chance
796 -> Athletic & outdoor sports & games
797 -> Aquatic & air sports
798 -> Equestrian sports & animal racing
799 -> Fishing, hunting & shooting

 

800

800 -> Literature & rhetoric
801 -> Philosophy & theory
802 -> Miscellany
803 -> Dictionaries & encyclopedias
804 -> [Unassigned]
805 -> Serial publications
806 -> Organizations & management
807 -> Education, research & related topics
808 -> Rhetoric & collections of literature
809 -> History, description & criticism
810 -> American literature in English
811 -> American poetry in English
812 -> American drama in English
813 -> American fiction in English
814 -> American essays in English
815 -> American speeches in English
816 -> American letters in English
817 -> American humor & satire in English
818 -> American miscellaneous writings
819 -> (Optional number)
820 -> English & Old English literatures
821 -> English poetry
822 -> English drama
823 -> English fiction
824 -> English essays
825 -> English speeches
826 -> English letters
827 -> English humor & satire
828 -> English miscellaneous writings
829 -> Old English (Anglo-Saxon)
830 -> Literatures of Germanic languages
831 -> German poetry
832 -> German drama
833 -> German fiction
834 -> German essays
835 -> German speeches
836 -> German letters
837 -> German humor & satire
838 -> German miscellaneous writings
839 -> Other Germanic literatures
840 -> Literatures of Romance languages
841 -> French poetry
842 -> French drama
843 -> French fiction
844 -> French essays
845 -> French speeches
846 -> French letters
847 -> French humor & satire
848 -> French miscellaneous writings
849 -> Occitan & Catalan literatures
850 -> Italian, Romanian & related literatures
851 -> Italian poetry
852 -> Italian drama
853 -> Italian fiction
854 -> Italian essays
855 -> Italian speeches
856 -> Italian letters
857 -> Italian humor & satire
858 -> Italian miscellaneous writings
859 -> Romanian & related literatures
860 -> Spanish & Portuguese literatures
861 -> Spanish poetry
862 -> Spanish drama
863 -> Spanish fiction
864 -> Spanish essays
865 -> Spanish speeches
866 -> Spanish letters
867 -> Spanish humor & satire
868 -> Spanish miscellaneous writings
869 -> Portuguese literature
870 -> Italic literatures; Latin literature
871 -> Latin poetry
872 -> Latin dramatic poetry & drama
873 -> Latin epic poetry & fiction
874 -> Latin lyric poetry
875 -> Latin speeches
876 -> Latin letters
877 -> Latin humor & satire
878 -> Latin miscellaneous writings
879 -> Literatures of other Italic languages
880 -> Hellenic literatures; classical Greek
881 -> Classical Greek poetry
882 -> Classical Greek dramatic poetry & drama
883 -> Classical Greek epic poetry & fiction
884 -> Classical Greek lyric poetry
885 -> Classical Greek speeches
886 -> Classical Greek letters
887 -> Classical Greek humor & satire
888 -> Classical Greek miscellaneous writings
889 -> Modern Greek literature
890 -> Literatures of other languages
891 -> East Indo-European & Celtic literatures
892 -> Afro-Asiatic literatures; Semitic literatures
893 -> Non-Semitic Afro-Asiatic literatures
894 -> Altaic, Uralic, Hyperborean & Dravidian
895 -> Literatures of East & Southeast Asia
896 -> African literatures
897 -> North American native literatures
898 -> South American native literatures
899 -> Austronesian & other literatures

 

 

900

900 -> History & geography
901 -> Philosophy & theory
902 -> Miscellany
903 -> Dictionaries & encyclopedias
904 -> Collected accounts of events
905 -> Serial publications
906 -> Organizations & management
907 -> Education, research & related topics
908 -> Kinds of persons treatment
909 -> World history
910 -> Geography & travel
911 -> Historical geography
912 -> Atlases, maps, charts & plans
913 -> Geography of & travel in ancient world
914 -> Geography of & travel in Europe
915 -> Geography of & travel in Asia
916 -> Geography of & travel in Africa
917 -> Geography of & travel in North America
918 -> Geography of & travel in South America
919 -> Geography of & travel in other areas
920 -> Biography, genealogy & insignia
921 -> (Optional number)
922 -> (Optional number)
923 -> (Optional number)
924 -> (Optional number)
925 -> (Optional number)
926 -> (Optional number)
927 -> (Optional number)
928 -> (Optional number)
929 -> Genealogy, names & insignia
930 -> History of ancient world to ca. 499
931 -> China to 420
932 -> Egypt to 640
933 -> Palestine to 70
934 -> India to 647
935 -> Mesopotamia & Iranian Plateau to 637
936 -> Europe north & west of Italy to ca. 499
937 -> Italy & adjacent territories to 476
938 -> Greece to 323
939 -> Other parts of ancient world to ca. 640
940 -> History of Europe
941 -> British Isles
942 -> England & Wales
943 -> Central Europe; Germany
944 -> France & Monaco
945 -> Italian Peninsula & adjacent islands
946 -> Iberian Peninsula & adjacent islands
947 -> Eastern Europe; Russia
948 -> Scandinavia
949 -> Other parts of Europe
950 -> History of Asia; Far East
951 -> China & adjacent areas
952 -> Japan
953 -> Arabian Peninsula & adjacent areas
954 -> South Asia; India
955 -> Iran
956 -> Middle East (Near East)
957 -> Siberia (Asiatic Russia)
958 -> Central Asia
959 -> Southeast Asia
960 -> History of Africa
961 -> Tunisia & Libya
962 -> Egypt & Sudan
963 -> Ethiopia & Eritrea
964 -> Northwest African coast & offshore islands
965 -> Algeria
966 -> West Africa & offshore islands
967 -> Central Africa & offshore islands
968 -> Southern Africa; Republic of South Africa
969 -> South Indian Ocean islands
970 -> History of North America
971 -> Canada
972 -> Middle America; Mexico
973 -> United States
974 -> Northeastern United States
975 -> Southeastern United States
976 -> South central United States
977 -> North central United States
978 -> Western United States
979 -> Great Basin & Pacific Slope region
980 -> History of South America
981 -> Brazil
982 -> Argentina
983 -> Chile
984 -> Bolivia
985 -> Peru
986 -> Colombia & Ecuador
987 -> Venezuela
988 -> Guiana
989 -> Paraguay & Uruguay
990 -> History of other areas
991 -> [Unassigned]
992 -> [Unassigned]
993 -> New Zealand
994 -> Australia
995 -> Melanesia; New Guinea
996 -> Other parts of Pacific; Polynesia
997 -> Atlantic Ocean islands
998 -> Arctic islands & Antarctica
999 -> Extraterrestrial worlds

DDC