Classification of electronics
General Circuits

1 Electric Circuits

2 Electronic Circuits

3 Computer Circuits

General Components and Materials

1 Electric Components and Materials

2 Electronic Components and Materials

3 Computer Components and Materials

General Photonics

1 Lasers

2 Optics

3 Light

4 Vision

General Control and Systems

41 Computer Control

42 Microcontrollers

43 Guidance Systems

44 Robotic Systems

45 Control Devices

General Telecommunications

1 Telephone and Other Line Communications

2 Television Communications

3 Radio Communications

4 Radar Communications

General Telecommunications Equipment and Instrumentation

1 Telephone and Other Line Equipment and Instrumentation

2 Television Equipment and Instrumentation

3 Radio Equipment and Instrumentation

4 Radar Equipment and Instrumentation

Power Systems

1 Electric Machinery, Generators, and Motors

2 Electric Batteries

3 Fuel Cells

4 Solar Cells

Theoretical

1 Electromagnetic Waves

2 Acoustic Waves

3 Electricity

4 Magnetism

Electronics and Communications Milieux

1 The Electronics and Communications Industry

2 History of Electronics and Communications

3 Electronics and Communications Education

4 Management of Electronics and Communications Systems

Electronics -the branch of physics that deals with the emission and effects of electrons and with the use of electronic devices.