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Melvil Decimal System: 621

Wording: Technology > Engineering > Mechanical Engineering and Machinery

Dewmoji: 💡 > 🔩 > 🏭

0
Information
174,304
ℹī¸
1
Philosophy and Psychology
161,748
💭
2
Religion
423,003
🙏đŸŊ
3
Social Sciences
881,215
đŸ‘Ģ
4
Language
117,983
đŸ’Ŧ
5
Mathematics and Science
273,951
đŸ”Ŧ
6
Technology
639,220
💡
7
Arts and Recreation
651,263
🎨
8
Literature
864,955
📚
9
Biography and History
550,626
đŸ—ŋ
60
General Technology
6,247
💡
61
Medicine
207,679
💉
62
Engineering
102,529
🔩
63
Agriculture & Animal Husbandry
61,837
🌱
64
Home Economics
122,969
🏠
65
Business
99,248
👔
66
Chemical Technology
11,497
🚀
67
Manufacturing
4,874
đŸ“Ļ
68
Handicraft and Occupations
14,120
🔨
69
Building
8,220
👷
620
Engineering
12,098
🔩
621
Mechanical Engineering and Machinery
31,197
🏭
622
Mining Engineering and Mines and Mineral Resources
2,343
đŸ•ŗ
623
Military Engineering and Marine Engineering
10,854
⚓
624
Civil Engineering
5,407
🌉
625
Road and Railroad
3,417
🛤
626
--
29
🤷
627
Hydraulic Engineering
1,059
🌊
628
Sanitary; Municipal
4,548
đŸšŊ
629
Other Branches
31,577
đŸŒŋ
621.0
536
621.1
Steam engineering
377
621.2
Hydraulic machinery
172
621.3
Electric engineering
21,829
621.4
Heat engineering
2,248
621.5
Pneumatic machinery and Compressed air and Refrigeration and refrigerating machinery
274
621.6
Fans (Machinery) and Pumping machinery
99
621.7
Production engineering and Factories and Machine-shop practice
82
621.8
Other mechanical engineering topics
1,780
621.9
Machine-tools
873

Works under MDS 621

31,197 results. First 2,000 shown.

1–50 of 1,938 ( 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.

MDSScheduleRatioCount
005.43Information > Computing And Information > Computer Software > Compilers And Operating Systems > Unix-Like16.8134
005.13Information > Computing And Information > Computer Software > Programming > Languages14.5363
537Mathematics and Science > Physics > Electricity14.5145
005.1Information > Computing And Information > Computer Software > Programming11.6580
005.4Information > Computing And Information > Computer Software > Compilers And Operating Systems 11.3315
004.1Information > Computing And Information > Computer Hardware > By Computer Type11.1133
004.16Information > Computing And Information > Computer Hardware > By Computer Type > Personal Computers10.8119
531Mathematics and Science > Physics > Mechanics10.7118
005.44Information > Computing And Information > Computer Software > Compilers And Operating Systems 10.3144
004.6Information > Computing And Information > Computer Hardware > Networking10.2296
001.64Information > Computing And Information > Knowledge > Computer Science9.9139
001.6Information > Computing And Information > Knowledge > Computer Science9.4169
530.1Mathematics and Science > Physics > Physics > Theoretical Physics9.2202
005.8Information > Computing And Information > Computer Software > Computer Security9.1163
004Information > Computing And Information > Computer Hardware8.2844
005Information > Computing And Information > Computer Software8.11652
530Mathematics and Science > Physics > Physics8498
53XMathematics and Science > Physics7.9970
00XInformation > Computing And Information6.93150
515Mathematics and Science > Mathematics > Analysis6.7227

Related tags

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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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