History (1995): Panasonic Phase-Change Dual Disk

This article was published by the Museum of Obsolete Media.

Phase-change Dual (PD) disk (1995-1998)

Introduced by Panasonic in 1995, the Phase-Change Dual (PD) disk is a rewritable optical disk similar to later technologies like CD-RW. They have a capacity of 650MB and could be rewritten 500,000 times.

Like DVD-RAM disks, they are enclosed in a protective cartridge.