Home of the industry group promoting CD-R and CD-RW. Basic tutorial illustrated with cartoons.

This article includes an description of the physical structure and encoding of data on CDs. It covers the frame and block levels including EFM, interleaving and subcode channels.

A guide to audio and data CD media technology. Includes a discussion of the influence of laser wavelength on track geometry, and also covers encoding (EFM, parity, subcode channels), capacity analysis and data structures.

This document gives basic information on the High Density (HD) format developed by Sanyo.

Has information about offsets and the real size of CD-Rs.

Safety advice for CD ROM drives that develop small cracks.

This article contrasts DVD-R, DVD-RW, DVD-RAM, DVD+RW, and includes questions and answers.

An introduction to DVD-RAM technology. Includes brief comparison with DVD-R and DVD-RW.

Explanation of the technology of CD-RW drives, contains interactive flash animations.

Covering the latest news on DVD writers and authoring.