Compact disc

A Compact disc (sometimes refered to as CD) is a form of storage used to store any sort of digital date, commonly known for storing music. CDs were developed by Sony and Phillips in the 1970's until a succesful one was created in 1982 after the two companies collaborated on the project. They are no as popular in modern times due to the invention of mp3 players that allow more storage for music files. In 2008, CD sales went down to 20%.

Glovey stories
Although the CD does not get invented yet until a few centuries later by humans, the Smurfs actually develop their version of CDs in the middle ages. It is an invention of the Smurfs and Sunwalkers, created by Handy Smurf and Zowfee. It was intended to be used to record messages or threats on the Sun by foreign invaders to be played on super computers, while it is being used on Earth in the Smurfs' village to record music by Glovey Smurf and the Smurflings' band.