Computer

Computer Maintenance and it's Components (Motherboard  ,RAM ,Cards ,HD board/media,)

                                                                                  Motherboard

                                                                                             RAM

                                                                                               Cards

                                                                                          hard Disk

Bad Sector Maintenance, and Hard Media Maintenance

Electronics        

1)      Components

2)      PCB                                                           

3)      Micro controller 

4)      EEPROM

5)      Circuit design