science

List of Dewey Decimal classes

List of Dewey Decimal classes is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand List of Dewey Decimal classes rather than just read about it. In short: The Dewey Decimal Classification (DDC) is structured around ten main classes covering the entire world of knowledge; each main class is further structured into ten hierarchical divisions, each having ten divisions of increasing specificity. As a system of library classification, the DDC is "arranged by discipline, not subject", so a topic like clothing is classed based on its disciplinary treatment (psychological in…

Key takeaways

List of Dewey Decimal classes belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect List of Dewey Decimal classes to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of List of Dewey Decimal classes from memory before moving on to harder problems.

Reference excerpt

The Dewey Decimal Classification (DDC) is structured around ten main classes covering the entire world of knowledge; each main class is further structured into ten hierarchical divisions, each having ten divisions of increasing specificity. As a system of library classification, the DDC is "arranged by discipline, not subject", so a topic like clothing is classed based on its disciplinary treatment (psychological influence of clothing at 155.95, customs associated with clothing at 391, and fashion design of clothing at 746.92) within the conceptual framework. The following list presents the ten main classes, hundred divisions, and thousand sections.

Class 000 – Computer science, information, and general works 000 Computer science, knowledge, and systems 000 Computer science, information and general works 001 Knowledge 002 The book (writing, libraries, and book-related topics) 003 Systems 004 Data processing and computer science 005 Computer programming, programs, and data 006 Special computer methods (e.g. AI, multimedia, VR) 007–009 [Unassigned] 010 Bibliographies 010 Bibliography 011 Bibliographies 012 Bibliographies of individuals 013 [Unassigned] 014 Bibliographies of anonymous and 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. [moved to 017] 019 Dictionary catalogs [moved to 017] 020 Library and information sciences 020 Library and information sciences 021 Library relationships (with archives, information centers, etc.) 022 Administration of physical plant 023 Personnel management 024 [Unassigned] 025 Library operations 026 Libraries for specific subjects 027 General libraries 028 Reading and use of other information media 029 [Unassigned] 030 Encyclopedias and books of facts 030 General encyclopedic works 031 Encyclopedias in American English 032 Encyclopedias in English 033 Encyclopedias in other Germanic languages 034 Encyclopedias in French, Occitan, and Catalan 035 Encyclopedias in Italian, Romanian, and related languages 036 Encyclopedias in Spanish and Portuguese 037 Encyclopedias in Slavic languages 038 Encyclopedias in Scandinavian languages 039 Encyclopedias in other languages 040 Unassigned — formerly Biographies 050 Magazines, journals and serials 050 General serial publications 051 Serials in American English 052 Serials in English 053 Serials in other Germanic languages 054 Serials in French, Occitan, and Catalan 055 Serials in Italian, Romanian, and related languages 056 Serials in Spanish and Portuguese 057 Serials in Slavic languages 058 Serials in Scandinavian languages 059 Serials in other languages 060 Associations, organizations and museums 060 General organizations and 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 and Monaco 065 Organizations in Italy and adjacent islands 066 Organizations in Iberian Peninsula and adjacent islands 067 Organizations in eastern Europe; in Russia 068 Organizations in other geographic areas 069 Museum science 070 News media, journalism, and publishing 070 News media, journalism, and publishing 071 Newspapers in North America 072 Newspapers in British Isles; in England 073 Newspapers in central Europe; in Germany 074 Newspapers in France and Monaco 075 Newspapers in Italy and adjacent islands 076 Newspapers in Iberian peninsula and adjacent islands 077 Newspapers in eastern Europe; in Russia 078 Newspapers in Scandinavia 079 Newspapers in other geographic areas 080 Quotations 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 Collections in Italian, Romanian, and related languages 086 Collections in Spanish and Portuguese 087 Collections in Slavic languages 088 Collections in Scandinavian languages 089 Collections in other languages 090 Manuscripts and rare books 090 Manuscripts and 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, and hoaxes 099 Books notable for format

… excerpt ends here. Continue reading the full article.

Worked examples

Example 1 — a first encounter with List of Dewey Decimal classes

Start with the simplest possible case. Write down what List of Dewey Decimal classes claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to List of Dewey Decimal classes before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about List of Dewey Decimal classes ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of List of Dewey Decimal classes

In research: List of Dewey Decimal classes appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses List of Dewey Decimal classes in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: List of Dewey Decimal classes is common in secondary-school and first-year university syllabi. It links to neighbouring topics Dewey Decimal Classification, so understanding it makes those chapters shorter.
In everyday life: Look for List of Dewey Decimal classes outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study List of Dewey Decimal classes in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what List of Dewey Decimal classes means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain List of Dewey Decimal classes out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is List of Dewey Decimal classes in simple terms?

Why does List of Dewey Decimal classes matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study List of Dewey Decimal classes?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on List of Dewey Decimal classes.