error squared

: 41 phrases in 17 subjects

Air defense	2
Artificial intelligence	4
Automobiles	2
Aviation	1
Business	6
Desert science	1
Earth sciences	4
Economics	1
Electronics	4
Engineering geology	1
Explosives and Explosive Ordnance Disposal	1
General	1
Geophysics	1
Mathematics	2
Oil / petroleum	2
Space	3
Technology	5