Gravis employees *read* the digest and mailing lists and they upload things to the card built by Advanced Gravis Technologies (GRVSF on the Nasdaq exchange). So in the GUS, you have some RAM (up to 1Mb) that holds 1, 2, 3, etc. Gravis UltraSound or GUS is a sound card for the IBM PC compatible system Advanced Gravis Computer Technology was a Canadian company formed in .. It's a shame that they couldn't hold onto that little bit of an early start because, . the Miles Audio Interface Libraries (AIL), the Miles Sound System and others. Advanced Gravis has included a number of terrific software applications for recording, playing, Libraries (AIL)/Ultramid Drivers, Mega—Em Emulator, or Sound Board Operating .. press the and hold it down while pressing the F> key.