Bryan Wilcutt writes "In 1985, a BBS named "Zyolog" was created and sold amongst TI 99/4A owners. The author (yours truly) was credited for adding "CRC" to Xmodem, hence "Xmodem-CRC". I worked this effort in conjunction with Ward Christenson who ran Country Cupboards. I ran Zyolog from 1985 to 1990, then ran Sirius Cybernetics [Hawaii] from 1990 to 1993 on an Amiga [you can still google for the name]. Numerous Zyolog BBSs were operated world wide. References to the BBS can still be made to this day by google'ing "Zyolog". The software is copyrighted, I still have the copyright TR sheet from the copyright office. There's a lot of google references to zyolog, I'm the one with "Byte Rider" mentioned."