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, SIGPLAN NotiCes 14(8):92-97 (Aug 1979).