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English thesaurus
Spiral Development
abbr., mil., commer.	SD

Spiral: 236 phrases in 25 subjects

Agriculture	18
Chemistry	11
Coal	5
Communications	9
Construction	12
Earth sciences	4
Economy	7
Education	2
Electronics	13
Forestry	13
General	5
Health care	1
Industry	14
Information technology	1
Law	1
Materials science	4
Mechanic engineering	58
Medical	19
Metallurgy	15
Municipal planning	3
Natural sciences	7
Patents	3
Technology	4
Transport	6
Zoology	1