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Melvil Decimal System: 621.39

Wording: Technology > Engineering, contracts > Mechanical Engineering and Machinery > Electric engineering > Computers

Dewmoji: ๐Ÿ’ก > ๐Ÿ”ฉ > ๐Ÿญ > ? > ?

0
Information
196,271
โ„น๏ธ
1
Philosophy and Psychology
182,817
๐Ÿ’ญ
2
Religion
463,618
๐Ÿ™๐Ÿฝ
3
Social Sciences
1,017,722
๐Ÿ‘ซ
4
Language
130,463
๐Ÿ’ฌ
5
Mathematics and Science
322,970
๐Ÿ”ฌ
6
Technology
751,858
๐Ÿ’ก
7
Arts and Recreation
695,837
๐ŸŽจ
8
Literature
929,792
๐Ÿ“š
9
Biography and History
592,368
๐Ÿ—ฟ
60
General Technology
6,985
๐Ÿ’ก
61
Medicine
251,982
๐Ÿ’‰
62
Engineering, contracts
128,146
๐Ÿ”ฉ
63
Agriculture & Animal Husbandry
68,016
๐ŸŒฑ
64
Home Economics
130,045
๐Ÿ 
65
Business
119,888
๐Ÿ‘”
66
Chemical Technology
15,663
๐Ÿš€
67
Manufacturing
6,358
๐Ÿ“ฆ
68
Handicraft and Occupations
15,511
๐Ÿ”จ
69
Building
9,264
๐Ÿ‘ท
620
Engineering
18,961
๐Ÿ”ฉ
621
Mechanical Engineering and Machinery
40,539
๐Ÿญ
622
Mining Engineering and Mines and Mineral Resources
2,834
๐Ÿ•ณ
623
Military Engineering and Marine Engineering
11,904
โš“
624
Civil Engineering
7,081
๐ŸŒ‰
625
Road and Railroad
3,892
๐Ÿ›ค
626
--
37
๐Ÿคท
627
Hydraulic Engineering
1,379
๐ŸŒŠ
628
Sanitary; Municipal
6,166
๐Ÿšฝ
629
Other Branches
35,353
๐ŸŒฟ
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
621.30
420
621.31
4,008
621.32
296
621.33
30
621.34
104
621.35
27
621.36
2,576
621.37
108
621.38
Electronics, Communications.
17,177
621.39
Computers
2,162
621.390
55
621.391
361
621.392
119
621.393
4
621.394
1
621.395
523
621.396
10
621.397
138
621.398
143
621.399
43

Works under MDS 621.39

2,162 results. First 2,000 shown.

1–50 of 1,856 ( 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
005.1Information > Computing And Information > Computer Software > Programming28.3113
005Information > Computing And Information > Computer Software24.6345
004Information > Computing And Information > Computer Hardware24.4195
00XInformation > Computing And Information19.2594
0XXInformation11604

Related tags

apple (89) autobiography (51) biography (181) business (31) circuits (26) computer (236) computer architecture (29) computer hardware (30) computer repair (28) computer science (225) computers (418) computing (148) design (41) digital design (35) ebook (75) EE (82) electrical engineering (79) electronics (219) engineering (111) fs (66) hardware (219) history (36) how-to (25) mac (25) math (26) network (27) non-fiction (370) PC (42) programming (47) read (32) reference (108) science (42) Steve Jobs (31) technical (43) technology (139) textbook (77) to-read (88) uncategorized (38) unread (25) VHDL (37)

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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