Mini CD

[1] Amongst the various formats are the In 1997, Dean Procter of Imaginet was offering business card sized square CDs with full screen hi-fi stereo video which played in quad speed CD-ROM or DVD drives with the centre well.

[2] When Mini CDs were first introduced in the United States, they were initially marketed as CD3, in reference to their approximate size in inches; larger CDs were called CD5, despite the fact that both CD specifications are defined solely in terms of metric units.

Not until after the major record labels discontinued them, did the CD Players start to have the 80 mm circular indentation as standard.

[3][4]: 111 In 2002, Compaq offered a compact, lightweight Mini CD player that made up for the capacity difference between 120 mm and 80 mm audio CDs by using MP3 compression, resulting in 1.1x to 3.5x the capacity of a standard audio CD, depending on compression ratio.

The player could also play Red Book audio content burned onto mini CDs.

was a portable CD-R burner that was a similar form factor to that of the Memorex Mini CD player.

Again, it was marketed as an MP3 device, and it could play MP3 and WMA files burned onto Mini CD media.

The device suffered some setbacks, most notably a slow CD initialize time (the time during which the drive analyzes the contents of an MP3 CD), maximum of 4X burning speed (due to the device using USB 1.1 to connect to its host computer), and no support for CD-RW media.

The device allowed the user to directly burn images from a Memory Stick or a USB flash drive or camera to a mini CD.