DG/L1. Descriptive Geometry Language. Early CAD/CAE language, used light pen. "Interactive Graphic Consoles - Environment and Software", R.L. Beckermeyer, Proc FJCC 37 (1970). 2. Data General ca 1973-1974. Derivative of ALGOL 60, developed from DG's ALGOL-5, used as the systems language under AOS and RDOS for the DG Eclipse family of computers. Replaced by PL/I in the early 80's. Data General manual 093-000229-01.