Compact disc
Compact disc (CD) is a digital optical disc data storage format that was co-developed by Philips and Sony and released in 1982. The format was originally developed to store and play only sound recordings (CD-DA) but was later adapted for storage of data (CD-ROM). Several other formats were further derived from these, including write-once audio and data storage (CD-R), rewritable media (CD-RW), Video Compact Disc (VCD), Super Video Compact Disc (SVCD), Photo CD, PictureCD, CD-i, and Enhanced Music CD. The first commercially available audio CD player, the Sony CDP-101, was released October 1982 in Japan.
Video CD
The VCD format was very popular throughout Asia
(except Japan and South Korea) in the late 1990s through the 2000s, with 8 million VCD players sold in China in 1997 alone,
and more than half of all Chinese households owning at least one VCD player by 2005. A big reason for the popularity is that Chinese engineer Wanmeng Jiang, founder of Wanyan Inc., developed the first VCD player. However, popularity has declined over the years, as the number of Hong Kong factories that produced VCDs dropped from 98 in 1999 to 26 in 2012.