====== DVD Based Formats ======

Many formats of DBEM are based on the DVD family of optical discs. These all had inner recording mediums of 120 mm (4-3/4 in), except for the smaller version of DVD-RAM.

===== Phase-change Dual =====

===== Blu-Ray =====

===== DVD-RAM =====

===== Panasonic Advanced Disc for Archive (ADA) =====

===== Sony Professional Disc (PD) =====