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Melvil Decimal System: 539.721

Wording: Mathematics and Science > Physics > Nuclear physics; Matter > Radioactivity > Not set > Not set

Dewmoji: đŸ”Ŧ > 🍎 > ⚛ > ? > ? > ?

0
Information
115,954
ℹī¸
1
Philosophy and Psychology
115,844
💭
2
Religion
351,090
🙏đŸŊ
3
Social Sciences
554,451
đŸ‘Ģ
4
Language
75,777
đŸ’Ŧ
5
Mathematics and Science
181,736
đŸ”Ŧ
6
Technology
414,821
💡
7
Arts and Recreation
444,897
🎨
8
Literature
605,140
📚
9
Biography and History
396,598
đŸ—ŋ
50
General Science
17,000
đŸ”Ŧ
51
Mathematics
32,369
➗
52
Astronomy
10,717
🌌
53
Physics
16,578
🍎
54
Chemistry
9,875
⚗
55
Earth sciences & geology
15,630
🌎
56
Fossils & prehistoric life
4,102
💀
57
Life Sciences
24,338
🐠
58
Botany
11,208
đŸŒŋ
59
Zoology
39,919
đŸŧ
530
Physics
8,689
🍎
531
Mechanics
1,328
💨
532
Fluid mechanics
563
đŸ’Ļ
533
Gas dynamics; Aerodynamics; Pneumatics
147
☁ī¸
534
Sound; Acoustics
340
🔔
535
Optics
1,593
🌈
536
Heat; Thermodynamics
570
đŸ”Ĩ
537
Electricity
1,099
⚡
538
Magnetism
446
ÎĻ
539
Nuclear physics; Matter
1,803
⚛
539.0
20
539.1
Theory; Molecular structure
69
539.2
Properties of solids
47
539.3
Elasticity; Torsion
2
539.4
Strength of materials
539.5
Permanent displacement of molecules
539.6
Intermolecular forces
45
539.7
Radioactivity
1,221
539.8
1
539.9
539.70
80
539.71539.72
358
539.73
52
539.74
20
539.75
117
539.76
61
539.77
26
539.78539.79
Tables; Problems; Questions
539.720
7
539.721
155
539.722
22
539.723
8
539.724539.725
68
539.726539.727539.728539.729
539.7210
4
539.7211
20
539.7212
3
539.7213
14
539.7214
2
539.7215
18
539.7216
29
539.7217
7
539.7218539.7219

Works under MDS 539.721

1–50 of 122 ( next )titles | covers | shelf
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Wording

1922 Edition
Modern language
Emoji

"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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