J. Gaffney, Evans & Sutherland 1976. Interpretive FORTH-like language for 3d graphics databases. Earliest forerunner of both Interpress and PostScript. Mentioned in PostScript Language Reference Manual, Adobe Systems, A-W 1985.
DESIGN SYSTEM LANGUAGE
Meaning of DESIGN SYSTEM LANGUAGE in English
FOLDOC computer English dictionary. Английский словарь по компьютерам FOLDOC. 2012