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Harmonic Progression
math., abbr.	HP

harmonical: 289 phrases in 38 subjects

Analytical chemistry	6
Astronomy	2
Automobiles	1
Coal	5
Communications	27
Computer numerical control	3
Construction	5
Cultural studies	1
Earth sciences	2
Electric motors	1
Electricity generation	2
Electronics	44
Gear train	1
General	6
High energy physics	4
Industry	1
Information technology	2
Life sciences	6
Magnetics	5
Mathematics	17
Measuring instruments	18
Mechanic engineering	2
Medical	1
Medical appliances	1
Metallurgy	3
Microelectronics	1
Optics branch of physics	2
Pharmacy and pharmacology	2
Physics	69
Power electronics	3
Radio	2
Scientific	2
Sound recording	1
Statistics	5
Technology	33
Telecommunications	1
Telephony	1
Transport	1