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Melvil Decimal System: 509.0

Wording: Mathematics and Science > General Science > Biography And History > By Period

Dewmoji: đŸ”Ŧ > đŸ”Ŧ > ⌛ > T

0
Information
174,134
ℹī¸
1
Philosophy and Psychology
161,536
💭
2
Religion
421,381
🙏đŸŊ
3
Social Sciences
880,123
đŸ‘Ģ
4
Language
117,795
đŸ’Ŧ
5
Mathematics and Science
273,636
đŸ”Ŧ
6
Technology
638,661
💡
7
Arts and Recreation
650,231
🎨
8
Literature
863,493
📚
9
Biography and History
549,572
đŸ—ŋ
50
General Science
23,042
đŸ”Ŧ
51
Mathematics
51,285
➗
52
Astronomy
15,190
🌌
53
Physics
26,304
🍎
54
Chemistry
15,621
⚗
55
Earth sciences & geology
24,685
🌎
56
Fossils & prehistoric life
6,037
💀
57
Life Sciences
36,740
🐠
58
Botany
15,400
đŸŒŋ
59
Zoology
59,332
đŸŧ
500
General Science
7,082
đŸ”Ŧ
501
Theory And Instruction
2,596
502
Miscellany
995
👝
503
Dictionaries And Encyclopedias
570
📕
504
[No longer in use]
121
🤷
505
Periodicals
154
T
506
Societies
265
507
Education And Research
3,128
508
Natural history
5,093
509
Biography And History
3,038
⌛
509.0
By Period
213
T
509.1
Other Geographic Classifications
44
509.2
Biography
791
509.3
Ancient World
77
509.4
Europe
287
509.5
Asia
86
509.6
Africa
8
509.7
North America
132
509.8
South America
29
509.9
Pacific
22
509.00
4
509.01
10
509.02
32
509.03
Early Modern
93
509.04
20th Century
67
509.05
21st Century
5
509.06509.07
1
509.08509.09
1

Works under MDS 509.0

1–50 of 201 ( next )titles | covers | shelf
( next )

Wording

1922 Edition
Modern language
Emoji
T

"Far Friends"

MDS classes with significant recommendations overlap, excluding ones under the same top-level class.

None

What is MDS?

Melvil stands for "Melvil Decimal System," named after Melvil Dewey, the famous librarian. Melvil Dewey invented his Dewey Decimal System in 1876, and early versions of his system are in the public domain.

More recent editions of his system are in copyright, and the name "Dewey," "Dewey Decimal," "Dewey Decimal Classification" and "DDC" are registered trademarked by OCLC, who publish periodic revisions.

LibraryThing's MDS system is based on the classification work of libraries around the world, whose assignments are not copyrightable. MDS "scheduldes" (the words that describe the numbers) are user-added, and based on public domain editions of the system.

The Melvil Decimal System is NOT the Dewey Decimal System of today. Wordings, which are entered by members, can only come from public domain sources. The base system is the Free Decimal System, a public domain classification created by John Mark Ockerbloom. Where useful or necessary, wording comes from the 1922 edition of the Dewey Decimal System. Language and concepts may be changed to fit modern tastes, or to better describe books cataloged. Wordings may not come from in-copyright sources.

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