O - P
Optical Drives
It is a component that uses laser lights to read or write data or content from CD's and DVD's. CD-ROM, CD-Writer, DVD-ROM and DVD Combo are all classified as Optical Drives.
Output Devices
POST
Power On Self-Test
PSU
Power Supply Unit provides DC Electricity to the Motherboard, HDD, Optical Drives and both Exhaust & Cooling Fans.