MDS 621.3813

Wording: Technology Engineering Applied physics Electrical, magnetic, optical, communications, computer engineering; electronics, lighting Electronics, communications engineering Electronics Not set

Dewmoji: 💡🔩🏭????

0 Computer science, information & general works 252,013 ℹ️	1 Philosophy and Psychology 270,129 🧠	2 Religion 681,242 🙏	3 Social sciences 1,328,382 👫	4 Language 209,883 💬	5 Natural sciences & mathematics 431,918 🔬	6 Technology 940,635 💡	7 Arts & recreation 1,031,850 🎨	8 Literature & rhetoric 1,436,736 📚	9 History & geography 837,760 🗺️
60 Technology 9,943 💡	61 Medicine & health 306,082 💉	62 Engineering 157,979 🔩	63 Agriculture 88,093 🌱	64 Home economics & family management 172,237 🏠	65 Management & public relations 145,064 👔	66 Chemical engineering 19,470 🚀	67 Manufacturing 8,724 📦	68 Manufacture for specific uses 20,805 🔨	69 Construction of buildings 12,238 👷
620 Engineering and allied operations 21,480 🔩	621 Applied physics 47,082 🏭	622 Mining and related operations 3,895 🕳	623 Military and nautical engineering 15,890 ⚓	624 Civil engineering 8,105 🌉	625 Engineering of railroads and roads 6,655 🛤	626 [Formerly: Canal Engineering] 83	627 Hydraulic engineering 1,873 🌊	628 Environmental engineering and sanitary engineering 7,319 🚽	629 Other branches of engineering 45,597 🌿
621.0 1,207	621.1 Steam engineering 687	621.2 Hydraulic machinery 291	621.3 Electrical, magnetic, optical, communications, computer engineering; electronics, lighting 33,501	621.4 Heat engineering 4,105	621.5 Pneumatic machinery and Compressed air and Refrigeration and refrigerating machinery 454	621.6 Fans (Machinery) and Pumping machinery 161	621.7 Production engineering and Factories and Machine-shop practice 182	621.8 Machine Engineering 2,644	621.9 Machine-tools 1,518
621.30 Electric power plant 436	621.31 Generation, modification, storage, transmission of electric power 5,025	621.32 Lighting 393	621.33 Electric Railways 50	621.34 Magnets and Electromagnets 121	621.35 Batteries and Superconductivity 40	621.36 Optical engineering 2,905	621.37 Electrical Measurement Instruments 156	621.38 Electronics, communications engineering 20,091	621.39 Computer engineering 2,322
621.380 Light current engineering 149	621.381 Electronics 8,998	621.382 Communications 4,017	621.383 Telegrapy 40	621.384 Radar, Radio 3,694	621.385 Telephony 334	621.386 Telephone terminal equipment 51	621.387 Telephone transmission equipment 28	621.388 Television 756	621.389 Audio, sound engineering 1,031
621.3810 315	621.3811 7	621.3812	621.3813 239	621.3814 1	621.3815 4,338	621.3816	621.3817 133	621.3818 10	621.3819 477
621.38130 2	621.38131 8	621.38132 63	621.38133 47	621.38134	621.38135	621.38136	621.38137 1	621.38138	621.38139