Compact Disc

Happy Compact Disc Day
Happy Compact Disc Day
Happy Compact Disc Day
It was on this date in 1981 the Compact Disc was first introduced. To impress your friends here's some background on the compact disc (CD), it's a small plastic disc used for the storage of digital data. As originally developed for audio systems, the sound signal is sampled at a rate of 44,100 times a second, then each sample is measured and digitally encoded on the 4 3/4 in (12 cm) disc as a