Am suprised no-one's mentioned DISKREET, the encrypted disk driver software included with the Norton Utilities. It does DES, though the manual doesn't mention which flavor of DES it uses. I have been using it for roughly 2 years now without any trouble. It's been well-behaved and is probably already on lots of folks' disks, by virtue of being included with the rest of the Norton stuff. I think "TPU" refers to Turbo Pascal Units. "Async Pro" is, if I remember right, the name of an add-on async communications library for Turbo Pascal. Telix is not free, but is freely distributable, as it's shareware. -- Greg Broiles greg@goldenbear.com Golden Bear Computer Consulting +1 503 465 0325 Box 12005 Eugene OR 97440 BBS: +1 503 687 7764