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Schauzeichen n (Fernsprecher); Fallklappe f (Fernsprecher)

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Agriculture	55
Alternative dispute resolution	17
American usage, not spelling	2
Analytical chemistry	9
Antennas and waveguides	6
Astronomy	7
Automated equipment	7
Automobiles	12
Biology	2
Boxing	1
British usage, not spelling	3
Business	22
Chemistry	25
Coal	16
Communications	38
Computers	25
Construction	114
Cycle sport	1
Drives	1
Earth sciences	22
Economics	26
Education	5
Electric machinery	3
Electrochemistry	1
Electronics	47
Emergency medical care	2
Energy industry	3
Engines	2
Environment	11
Figurative	3
Finances	6
Food industry	2
Football	3
Foreign trade	1
Gardening	1
General	207
Geology	1
Geophysics	1
Gymnastics	7
Health care	10
Hobbies and pastimes	2
Hydrography	1
Industry	27
Informal	21
Information technology	24
Labor law	2
Law	7
Life sciences	13
Marketing	2
Materials science	5
Measuring instruments	20
Mechanic engineering	83
Medical	75
Medical appliances	18
Metallurgy	59
Microelectronics	25
Microsoft	16
Mining	34
Municipal planning	3
Natural resourses and wildlife conservation	6
Natural sciences	2
Nuclear physics	15
Obsolete / dated	4
Oils and lubricants	4
Opencast mining	1
Optics branch of physics	23
Packaging	5
Patents	1
Pharmacy and pharmacology	1
Physics	30
Polygraphy	7
Power system protection	2
Quality control and standards	2
Racing and motorsport	1
Radiation	5
Rail transport	1
Refrigeration	4
Rude	2
Sailing	2
Scientific	1
Skiing	3
Skydiving	12
Social science	15
Statistics	1
Stock Exchange	2
Table tennis	1
Technology	248
Tennis	2
Textile industry	10
Timber floating	1
Transformers	1
Transport	84
Travel	1
United Nations	1
Vacuum tubes	2
Volleyball	9
Weapons and gunsmithing	7
Work flow	3