TriINTERCAL is an esoteric programming language created by Louis Howell in 1991 as a more difficult version of INTERCAL. It uses ternary instead of binary, and introduces the logical BUT operation.| esolangs.org
PLEASE NOTE that this article only discusses the differences with other dialects of INTERCAL: familiarity with INTERCAL or C-INTERCAL may be required to understand this article.| esolangs.org
C-INTERCAL is an INTERCAL implementation first released on 12 May 1990 by Eric S. Raymond. Although compatible with INTERCAL-72, it has extensions for things like computed COME FROM, computed ABSTAIN, Threaded INTERCAL, Backtracking INTERCAL, and a debugger and profiler. The implementation is written in and compiles programs to POSIX-compatible C. It also supports TriINTERCAL.| esolangs.org