Compact disc - Wikipedia The compact disc (CD) is a digital optical disc data storage format co-developed by Philips and Sony to store and play digital audio recordings It employs the Compact Disc Digital Audio (CD-DA) standard and is capable of holding uncompressed stereo audio First released in Japan in October 1982, the CD was the second optical disc format to reach the market, following the larger LaserDisc (LD
What Is a Certificate of Deposit (CD)? Pros and Cons Learn how certificates of deposit (CDs) work, how they offer safe, fixed returns over set terms, and how they compare to savings accounts for growing your money