So obsolete, in fact, that it may quickly join the ranks of such Sony success stories as the hard drive floppy disk and the Betamax video format.

FORBES: Sony Establishes New, Obsolete CD-ROM Format

Plus: videocassette players, portable video recorders, the now-ubiquitous Walkman and 3.5-inch floppy disk drives, launched in 1980.

FORBES: Book Excerpt