How is the Optical disc similar to the compact disc?

Answer:

A compact disc is a type of optical disc.

"Optical disc" is an umbrella term for any type of storage media which uses optical technology (as opposed to magnetic) for data storage. This includes but is not limited to DVDs, CDs, H-DVD, blu-ray, laser discs CDRW's, and DVDRW's

First answer by Chewd. Last edit by Chewd. Contributor trust: 242 [recommend contributor recommended]. Question popularity: 3 [recommend question].