Source : Free On-Line Dictionary of Computing

TCOL.Ada
     
        CMU, 1980.  An intermediate representation for Ada, was merged
        with AIDA to form Diana.  "TCOL.Ada: Revised Report on an
        Intermediate Representation for the DOD Standard Programming
        Language", J.M. Newcomer et al, CMU-CS-79-128 (June 1979).