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Melvil Decimal System: 621.87

Wording: Technology > Engineering, contracts > Mechanical Engineering and Machinery > Other mechanical engineering topics > Not set

Dewmoji: πŸ’‘ > πŸ”© > 🏭 > ? > ?

0
Information
196,271
ℹ️
1
Philosophy and Psychology
182,817
πŸ’­
2
Religion
463,618
πŸ™πŸ½
3
Social Sciences
1,017,722
πŸ‘«
4
Language
130,463
πŸ’¬
5
Mathematics and Science
322,970
πŸ”¬
6
Technology
751,857
πŸ’‘
7
Arts and Recreation
695,836
🎨
8
Literature
929,792
πŸ“š
9
Biography and History
592,368
πŸ—Ώ
60
General Technology
6,985
πŸ’‘
61
Medicine
251,982
πŸ’‰
62
Engineering, contracts
128,146
πŸ”©
63
Agriculture & Animal Husbandry
68,016
🌱
64
Home Economics
130,044
🏠
65
Business
119,888
πŸ‘”
66
Chemical Technology
15,663
πŸš€
67
Manufacturing
6,358
πŸ“¦
68
Handicraft and Occupations
15,511
πŸ”¨
69
Building
9,264
πŸ‘·
620
Engineering
18,961
πŸ”©
621
Mechanical Engineering and Machinery
40,539
🏭
622
Mining Engineering and Mines and Mineral Resources
2,834
πŸ•³
623
Military Engineering and Marine Engineering
11,904
βš“
624
Civil Engineering
7,081
πŸŒ‰
625
Road and Railroad
3,892
πŸ›€
626
--
37
🀷
627
Hydraulic Engineering
1,379
🌊
628
Sanitary; Municipal
6,166
🚽
629
Other Branches
35,353
🌿
621.0
1,010
621.1
Steam engineering
504
621.2
Hydraulic machinery
203
621.3
Electric engineering
28,314
621.4
Heat engineering
3,312
621.5
Pneumatic machinery and Compressed air and Refrigeration and refrigerating machinery
375
621.6
Fans (Machinery) and Pumping machinery
139
621.7
Production engineering and Factories and Machine-shop practice
129
621.8
Other mechanical engineering topics
2,179
621.9
Machine-tools
1,070
621.80
60
621.81
343
621.82
98
621.83
49
621.84
20
621.85
15
621.86
243
621.87
27
621.88
45
621.89
170
621.870621.871621.872
3
621.873
17
621.874621.875621.876621.877
4
621.878621.879

Works under MDS 621.87

1–26 of 26 titles | covers | shelf

Wording

1922 Edition
Modern language
Emoji

"Far Friends"

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

None

Related tags

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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