He also compiled the website for sale in CD-ROM format.

Nearly a dozen companies are or soon will be publishing multimedia magazines that exist only in the CD-ROM format.

However, the game was published in a CD-ROM format with the blue disc bottom.

It was first published on diskette in early 1993, and in an expanded CD-ROM format by the end of 1994.

In 2001, a fifth volume was published in CD-ROM format.

Beginning in 2002 it was available only in CD-ROM format.

The new CD-ROM format will be faster to access and easier to manipulate.

A further updating of the work, with revisions and corrections, was later issued in CD-ROM format.

The earliest efforts at interactive storytelling were on computer games, especially after the CD-ROM format made it possible to include videos and high-quality sound.

The 3rd edition (1983) added 12,000 entries, and was published in CD-ROM format in 1987.