"Citadel was written in mid-December 1981 by CrT. Miraculously, it ran three days unattended over New Year's, collecting some remarkably favorable reactions. During the months that it ran at 633-3282 (ODD-DATA), Citadel became one of the more popular BBs in town, and there was some disappointment when a hardware failure forced the system down in February of 1982. But in January CrT had published the source code in BDS C, putting it in the public domain."

"David Mitchell brought up the next incarnation of the Citadel program in April of 1982, running on hardware provided by Richard Knox. Called the Island Communication System, it is located on Bainbridge Island in Puget Sound. ICS has about 30 regular users and about 120 log entries. Newcomers find it easy to learn, and often leave messages praising it. Some of the system's daily users are in Boston."

"Citadel is descended from DandD.pas, an adventure game editor/driver. It is arranged as a series of rooms, starting with the LOBBY. In each room the user can read existing messages and leave more. There may be up to 128 rooms in the current implementation. The system was brought up with only one room, the LOBBY. Additional rooms were created by the users, with room names appropriate to the topics covered."

"Citadel has had a checkered past. It first ran on a 64K Heath H89 with Magnolia CP/M."