Subject
Engineering
Design and construction
22
Data processing
20
Management
14
Electric machinery
12
Materials
12
Maintenance and repair
11
Statics
11
Automatic control
10
Dictionaries
10
Equipment and supplies
10
Vocational guidance
10
Computer-aided design
9
Electric engineering
9
Petroleum
9
Petroleum engineering
9
Science
9
Strength of materials
9
Electric circuits
8
Electric power systems
8
Measurement
8
Mechanical engineering
8
Offshore structures
8
Thermodynamics
8
Building
7
Electric circuit analysis
7
Engineering instruments
7
Fluid dynamics
7
Mathematic
7
Mechanics, Applied
7
Handbooks, manuals, etc
6
Mechanical drawing
6
Natural gas
6
Pipelines
6
Piping
6
Power electronics
6
Problems, exercises, etc
6
Building materials
5
Construction industry
5
Control theory
5
Oil reservoir engineering
5
Physics
5
Process control
5
Technology
5
Air conditioning
4
Chemical plants
4
Computer graphics
4
Dynamics
4
Electric motors
4
Electrical engineering
4
more ...