HOLWG, DoD, Jan 1977, revised Jul 1977.Fourth of the series of DoD requirements that led to Ada."Department of Defense Requirements for High Order Computer Programming Languages", SIGPLAN Notices 12(12):39-54 (Dec 1977)."Revised Ironman Requirements for High Order Computer Programming Languages", US Dept of Defense, Jul 1977.(See Strawman, Woodenman, Tinman, Steelman).