It Takes Three

It Takes Three (ITT)
USA&gt; Agron (sysop CASTLE BBS, 03/89), Defcon (code cosys, 03/89), Exel (sysop SHADOWORLD, 03/89).

ITT were an American group, mostly into running their boards. Defcon packing the tools 'zip' and 'unzip' in a single file was the only production ever released from the group. Thanks to Exel for information!