Mini CD
Videos
Mini CDs, or pocket CDs, are CDs with a smaller diameter and one-third the storage capacity of a standard 120 mm disc.
An 80 mm mini CD on the left, compared with a standard 120 mm CD on the right
A mini CD was a cost-effective solution for distributing small amounts of data, like device drivers.
Business card CD
MiniDisc
Videos
MiniDisc is a discontinued erasable magneto-optical disc-based data storage format offering a capacity of 60, 74, or 80 minutes of digitized audio.
Mini CD
…DVD card, the equivalent to the business card CD MiniDisc, the popular proprietary Sony mini optical media MiniDVD, the 80 mm DVD format, for video-singles…
MiniDisc by TDK, with AA battery for scale
The Sony MZ1, the first MiniDisc player, released in 1992.
Pioneer MiniDisc car receiver
Sony Hi-MD Recorder MZ-RH1, released 2006