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operational system
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Operational System
:
186 phrases
in 23 subjects
Air defense
3
Aviation
38
Business
1
Computers
1
Cryosphere
1
Earth sciences
19
Economics
1
Electricity
2
Electronics
42
General
2
Geology
1
Geophysics
1
Information technology
2
Management
2
Mechanics
1
Name of organization
2
Oil processing plants
1
Scientific
1
Shipbuilding
1
Space
34
Technology
18
Telecommunications
2
United States
10
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