MDS 621.384135

Wording: Applied science & technology Engineering Applied physics Electronics & Computers Electronics, communications engineering Radar, Radio Amateur radio Not set Not set

Dewmoji: 💡🔩🏭??????

0 Computer science, information & general works 252,013 ℹ️	1 Philosophy & psychology 270,129 🧠	2 Religion 681,242 🙏	3 Society, government, & culture 1,328,382 👫	4 Language 209,883 💬	5 Natural sciences & mathematics 431,918 🔬	6 Applied science & 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 Buildings 12,238 👷
620 Mechanical & Civil Engineering 21,480 🔩	621 Applied physics 47,082 🏭	622 Mining and related operations 3,895 🕳	623 Military Vehicles: Land, Air, & Sea 15,890 ⚓	624 Bridges & Tunnels 8,105 🌉	625 Railroads, Subways, Roads 6,655 🛤	626 [Formerly: Canal Engineering] 83	627 Dams, Lighthouses, Drilling Platforms 1,873 🌊	628 Water Treatment & Waste Disposal 7,319 🚽	629 Transportation Vehicles 45,597 🌿
621.0 1,207	621.1 Steam engineering 687	621.2 Hydraulic machinery 291	621.3 Electronics & Computers 33,501	621.4 Engines, Power Plants, Tools 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
621.3840 91	621.3841 Amateur radio 1,382	621.3842 18	621.3843 3	621.3844 1	621.3845 764	621.3846 5	621.3847	621.3848 Radar 382	621.3849
621.38410 6	621.38411 53	621.38412 54	621.38413 194	621.38414	621.38415 53	621.38416 227	621.38417 11	621.38418 73	621.38419 108
621.384130	621.384131 15	621.384132 35	621.384133 14	621.384134	621.384135 79	621.384136 41	621.384137	621.384138	621.384139
621.3841350 8	621.3841351	621.3841352	621.3841353	621.3841354	621.3841355 1	621.3841356	621.3841357	621.3841358	621.3841359