TAG (bulletin board system)
TAG is a DOS-based bulletin board system (BBS) computer program, released from 1986 to 2000. TAG was written in Borland Pascal and is free for business or personal use. The authors considered it fun to give the program away while others tried to charge for BBS programs. The software was a fork from an early version of the WWIV source code. At its peak, there were over 1000 running instances, mostly in the United States and Canada. The largest concentration was in the Detroit area, where it was one of the most popular BBS software run in the area. References

Bulletin board system software
DOS software
Computer-related introductions in 1986