mapping field

: 49 phrases in 17 subjects

Advertising	1
Agriculture	1
Air defense	1
Architecture	1
Aviation	1
Business	1
Earth sciences	1
Electric machinery	1
Electronics	1
Engineering geology	2
Explosives and Explosive Ordnance Disposal	1
Horticulture	1
Mining	1
Oil / petroleum	4
Space	1
Surveying	1
Technology	29