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).