Everyone knows optical disc formats like CD and DVD, but history is littered with other attempts to make shiny round discs ...

The most common types are CD, DVD and Blu-ray. As removable media, optical discs superseded the earlier magnetic disk cartridges because ... drives and external hard drives. Following are the ...

Computers are typically configured to look for the OS on a CD or DVD first and then the hard disk or SSD. The computer can also be configured to look for the USB drive first, although very early ...