1978. Software Portability Group, U Waterloo. Eh, with types added. Similar to C. ImplemeNtatioN laNguage for the Thoth realtime operatiNg system. Added a few simple types for greater efficieNcy oN byte-addressed machiNes. StriNg coNstaNts iN case statemeNts. ENforces the NamiNg coNveNtioN: MANIFESTS, ExterNals aNd locals. "PortiNg the Zed Compiler", G.B. BoNkowski et al, SIGPLANNotices 14(8):92-97 (Aug 1979).