| A | B |
|---|
| CD-ROM | optical disc that cannot be saved on, nor changed |
| optical disc | store and amazing amount of multimedia material |
| WORM | optical disc that you can write your own data on one time only |
| CD-R | rewritable optical disc, can be saved on and erased |
| laser | used to burn tiny pits into the CD surface |
| multimedia program | a program that includes sound, pictures, music and video |
| interactive program | a program that you can take part in and control |
| data compression | a process used to save space, especially when saving pictures |
| compact disc | the most popular version of an optical disc |
