1. A utility program, such as PKZIP, StuffIt or DriveSpace, that compresses and decompresses infrequently used files so that they take up to 40 to 90 percent less rooom on a hard disk. You use another utilit to decompress a file. Specialty file compression utilities that compress only certain types of files, such as downloadable font files, are also available. These programs usually load a special driver that remains in memory to decompress and recompress the files as needed. See archive, bulletin board system (BBSs), and compressed file. From QUECID