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Melvil Decimal System: 621.382201

Wording: Technology > Engineering > Mechanical Engineering and Machinery > Electric engineering > Electronics, Communications. > Communications > Not set > Not set > Not set

Dewmoji: ๐Ÿ’ก > ๐Ÿ”ฉ > ๐Ÿญ > ? > ? > ? > ? > ? > ?

0
Information
184,385
โ„น๏ธ
1
Philosophy and Psychology
173,011
๐Ÿ’ญ
2
Religion
444,891
๐Ÿ™๐Ÿฝ
3
Social Sciences
956,176
๐Ÿ‘ซ
4
Language
124,030
๐Ÿ’ฌ
5
Mathematics and Science
297,976
๐Ÿ”ฌ
6
Technology
694,518
๐Ÿ’ก
7
Arts and Recreation
670,607
๐ŸŽจ
8
Literature
893,417
๐Ÿ“š
9
Biography and History
568,807
๐Ÿ—ฟ
60
General Technology
6,677
๐Ÿ’ก
61
Medicine
230,484
๐Ÿ’‰
62
Engineering
113,881
๐Ÿ”ฉ
63
Agriculture & Animal Husbandry
64,778
๐ŸŒฑ
64
Home Economics
125,575
๐Ÿ 
65
Business
110,302
๐Ÿ‘”
66
Chemical Technology
13,705
๐Ÿš€
67
Manufacturing
5,492
๐Ÿ“ฆ
68
Handicraft and Occupations
14,844
๐Ÿ”จ
69
Building
8,780
๐Ÿ‘ท
620
Engineering
15,175
๐Ÿ”ฉ
621
Mechanical Engineering and Machinery
35,350
๐Ÿญ
622
Mining Engineering and Mines and Mineral Resources
2,565
๐Ÿ•ณ
623
Military Engineering and Marine Engineering
11,192
โš“
624
Civil Engineering
6,241
๐ŸŒ‰
625
Road and Railroad
3,577
๐Ÿ›ค
626
--
29
๐Ÿคท
627
Hydraulic Engineering
1,242
๐ŸŒŠ
628
Sanitary; Municipal
5,415
๐Ÿšฝ
629
Other Branches
33,095
๐ŸŒฟ
621.0
711
621.1
Steam engineering
417
621.2
Hydraulic machinery
191
621.3
Electric engineering
24,788
621.4
Heat engineering
2,773
621.5
Pneumatic machinery and Compressed air and Refrigeration and refrigerating machinery
325
621.6
Fans (Machinery) and Pumping machinery
110
621.7
Production engineering and Factories and Machine-shop practice
89
621.8
Other mechanical engineering topics
1,953
621.9
Machine-tools
962
621.30
403
621.31
3,494
621.32
283
621.33
26
621.34
97
621.35
26
621.36
2,237
621.37
95
621.38
Electronics, Communications.
15,094
621.39
Computers
1,940
621.380
Light current engineering
237
621.381
Electronics
6,604
621.382
Communications
3,052
621.383
Telegrapy
22
621.384
Radar, Radio.
2,750
621.385
Telephony
262
621.386
Telephone terminal equipment
57
621.387
Telephone transmission equipment
21
621.388
Television
627
621.389
Audio, sound engineering
818
621.3820
73
621.3821
239
621.3822
613
621.3823
31
621.3824
114
621.3825
63
621.3826621.3827
197
621.3828
56
621.3829
621.38220
65
621.38221621.38222621.38223
41
621.38224
70
621.38225621.38226621.38227621.38228621.38229
621.382200
1
621.382201
32
621.382202
26
621.382203621.382204621.382205
1
621.382206621.382207
5
621.382208621.382209
621.3822010621.3822011
2
621.3822012621.3822013621.3822014621.3822015
30
621.3822016621.3822017621.3822018621.3822019

Works under MDS 621.382201

1–31 of 31 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

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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