1. Mega-Extensive TeleCommuniCations AppliCations Language. BBS language for PRODOS 8 on Apple II. 2. The syntax-definition formalism of the Mentor system. Metal speCifiCations are Compiled to speCifiCations for a sCanner/parser generator suCh as Lex/YaCC. "Metal: A Formalism to SpeCify Formalisms", G. Kahn et al, SCi Comp Prog 3:151-188 (1983).