"Citadel-128 is an EMULATION of a mixture of CP/M CITADEL, CITADEL-86 and IDEATREE (sorry, but they DO have much better ".A" commands, and most of them have been incorporated here). The system is coded using BASIC 7.0 with several machine-code overlays to handle modem I/O and fileserving, in addition to a totally machine-code "online terminal" (we do not use CHATmode as the terminal...at least, not yet)." - Vince Quaresima