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класс по PG stresses
road.constr.	PG grade (Используется в профессиональной речи. PG = Production Grade Alexander Oshis)
класс по NPFA
sec.sys.	NFPA rating (serrgio)
классы ПО
progr.	software classes (ssn)
класс ПО
progr.	software class (ssn)

класс по: 307 phrases in 84 subjects

Agrochemistry	1
Aluminium industry	2
American usage, not spelling	2
Architecture	1
Art	3
Astronautics	4
Astronomy	1
Automated equipment	2
Automobiles	2
Aviation	13
Caspian	2
Chemical industry	2
Computer networks	1
Construction	6
Corporate governance	7
Data processing	1
Dentistry	6
Drilling	2
Ecology	2
Economy	16
Education	11
Electrical engineering	1
Electronics	2
Energy industry	1
Equestrian sports	1
Finances	9
Food industry	2
Forestry	3
General	30
Geology	1
Hairdressing	2
Historical	1
Industry	1
Information technology	1
Insurance	2
Investment	3
Librarianship	5
Literature	1
Logic	1
Makarov	20
Mass media	7
Mathematics	4
Mechanic engineering	5
Medical	5
Metallurgy	3
Metrology	3
Microelectronics	1
Military	21
Mining	1
Natural resourses and wildlife conservation	3
Nautical	1
Navy	6
Nuclear and fusion power	1
Oil / petroleum	4
Oil and gas	2
Oil and gas technology	1
Oil processing plants	2
Oils and lubricants	2
Patents	5
Philately / stamp collecting	1
Pipelines	1
Power system protection	1
Production	3
Professional jargon	1
Programming	13
Psychology	4
Pulp and paper industry	1
Quality control and standards	1
Rail transport	1
Real estate	1
Religion	2
Road works	1
Sakhalin	3
Sakhalin R	2
SAP tech.	1
School	2
Scientific	1
Seismology	1
Software	1
Technology	8
Telecommunications	3
Tengiz	1
Transport	1
Weapons of mass destruction	1