ABC Algol: The compiler

ABC ALGOL adic ALGOL 60 Algorithm array declaration array segment array symbol ASSIGN(Zf begin formula begin PR block depth bus symbol close symbol comma symbol contents of begin end else begin end symbol ERASE(fnn formula array formula expression formula procedure formula symbol goto L goto L1 id ass stat ident inf list information cell information list integer array integer Zf IRN necessary letgit line number Mathematisch Centrum monadic symbol NULL operator identifier param piass PR nlcr PR string PR string(+Z+ PR string(4 PR synt unit preceding begin proc id ass procedure PR procedure symbol ptr of inf ptr of text ptr to array ptr to formula ptr to integer put in text READ synt unit RESET reading ptrs second scan semicolon symbol standard identifier STORE into information sub symbol symbol then begin symbol then goto symbol then PR symbol v synt text array