HomeGroupsTalkZeitgeist

Melvil Decimal System: 621.381045

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

Dewmoji: πŸ’‘ > πŸ”© > 🏭 > ? > ? > ? > ? > ? > ?

0
Information
174,831
ℹ️
1
Philosophy and Psychology
162,225
πŸ’­
2
Religion
426,300
πŸ™πŸ½
3
Social Sciences
883,845
πŸ‘«
4
Language
118,460
πŸ’¬
5
Mathematics and Science
274,822
πŸ”¬
6
Technology
640,979
πŸ’‘
7
Arts and Recreation
654,095
🎨
8
Literature
868,418
πŸ“š
9
Biography and History
553,223
πŸ—Ώ
60
General Technology
6,267
πŸ’‘
61
Medicine
208,255
πŸ’‰
62
Engineering
102,787
πŸ”©
63
Agriculture & Animal Husbandry
62,084
🌱
64
Home Economics
123,370
🏠
65
Business
99,403
πŸ‘”
66
Chemical Technology
11,516
πŸš€
67
Manufacturing
4,874
πŸ“¦
68
Handicraft and Occupations
14,191
πŸ”¨
69
Building
8,232
πŸ‘·
620
Engineering
12,123
πŸ”©
621
Mechanical Engineering and Machinery
31,256
🏭
622
Mining Engineering and Mines and Mineral Resources
2,354
πŸ•³
623
Military Engineering and Marine Engineering
10,891
βš“
624
Civil Engineering
5,420
πŸŒ‰
625
Road and Railroad
3,442
πŸ›€
626
--
29
🀷
627
Hydraulic Engineering
1,060
🌊
628
Sanitary; Municipal
4,548
🚽
629
Other Branches
31,664
🌿
621.0
536
621.1
Steam engineering
378
621.2
Hydraulic machinery
172
621.3
Electric engineering
21,863
621.4
Heat engineering
2,255
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
83
621.8
Other mechanical engineering topics
1,785
621.9
Machine-tools
874
621.30
366
621.31
2,862
621.32
267
621.33
23
621.34
77
621.35
23
621.36
1,809
621.37
81
621.38
Electronics, Communications.
13,639
621.39
Computers
1,751
621.380
Light current engineering
214
621.381
Electronics
5,795
621.382
Communications
2,777
621.383
Telegrapy
22
621.384
Radar, Radio.
2,506
621.385
Telephony
257
621.386
Telephone terminal equipment
56
621.387
Telephone transmission equipment
19
621.388
Television
598
621.389
Audio, sound engineering
771
621.3810
309
621.3811
6
621.3812
1
621.3813
216
621.3814
2
621.3815
2,813
621.3816
3
621.3817
170
621.3818
12
621.3819
398
621.38100621.38101
15
621.38102
56
621.38103
22
621.38104
165
621.38105
3
621.38106
8
621.38107
26
621.38108621.38109
14
621.381040621.381041621.381042
5
621.381043
5
621.381044
33
621.381045
65
621.381046
54
621.381047621.381048621.381049

Works under MDS 621.381045

1–46 of 46 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.

About | Contact | Privacy/Terms | Help/FAQs | Blog | Store | APIs | TinyCat | Legacy Libraries | Early Reviewers | Common Knowledge | 120,833,237 books! | Top bar: Always visible