SNOBOL3 SNOBOL with user-defined functions. Written in 1965. The SNOBOL 6.3 compiler for the PDP-6 and PDP-10 was written in SNOBOL.
["The SNOBOL3 Programming Language", D.J. Farber et al, Bell Sys Tech J 45(6):895-944 (Jul 1966)]. Last updated: 1994-11-04