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Patch file
abbr., file.ext.	P22 (Patch22)

Patch: 254 phrases in 35 subjects

Agriculture	17
Antennas and waveguides	2
Aviation	2
Banking	3
British usage, not spelling	1
Chemistry	4
Communications	8
Computers	12
Construction	1
Cycling other than sport	1
Earth sciences	2
Electronics	4
Environment	16
Forestry	7
General	23
Health care	18
Hobbies and pastimes	3
Horticulture	1
Industry	25
Information technology	5
International Monetary Fund	1
Life sciences	4
Materials science	5
Medical	39
Metallurgy	4
Microsoft	3
Municipal planning	1
Natural resourses and wildlife conservation	1
Natural sciences	8
Power lines	1
Technology	12
Telecommunications	1
Textile industry	1
Transport	17
United Nations	1