The ACM Computing Classification System (1991) D.3 PROGRAMMING LANGUAGES D.3.0 General D.3.1 Formal Definitions and Theory (D.2.1, F.3.1, F.3.2, F.4.2, F.4.3) D.3.2 Language Classifications D.3.3 Language Constructs and Features (E.2) D.3.4 Processors D.3.m Miscellaneous