How much training material can fit onto a CD-ROM?
Depending on how much audio, video and graphics will be incorporated in your program, two to six hours of training material can be put on a CD-ROM. Video takes the most space, followed by audio, then graphics. Although text takes up the least amount of space, a large catalog, encyclopedia or book can also consume a lot of space. Plan about four hours of material per CD-ROM (more if the content is primarily text-based and less if the content is video-, audio- or graphics-intensive).