TBL[2]
Table Building Language
Robert Freiburghouse, MIT
A simple language which combines user-defined actions into an abstract machine. It was used to build table-driven predictive parsers and code generators in the MULTICS Fortran compiler and several PL/I compilers, including VAX-11 PL/I.
"Engineering A Compiler: VAX-11 Code Generation and Optimization", P. Anklam et al, Digital Press 1977.