During a recent science lesson, Anthony, 10, was using an interactive CD-ROM program to study how smoking burdens the heart, lungs and circulatory system.

But people who review software say that they encounter problems in roughly a quarter of what they test, even more with CD-ROM programs.

Once I got it running properly, this CD-ROM program, like most "based on" something successful, turned out to be nowhere nearly as interesting as the original.

The number of CD-ROM programs has grown gradually but steadily to about 2,500 titles.

Q. When I play CD-ROM programs on my computer, they seem to stutter.

Embedded in its center is a computer touchpad from which the viewer can access a series of interactive CD-ROM programs projected onto a video screen.

He questions art's distribution system by designing CD-ROM programs whose images purchasers may manipulate as they see fit.

These include the development of checklists, CD-ROM programs, and interactive computer programs.

MPI has formed a multi-media division to develop CD-ROM programs.

One CD-ROM program from a respected mapmaker proposed a vacation itinerary that began with a 20-mile drive in the wrong direction.