Dennis Ritchie's Primeval C Compiler: A Blast from the Past

This post shares the source code of the earliest known versions of the C compiler, written by the late legend Dennis Ritchie. These are not compilable with modern C compilers like GCC, but represent the spark that ignited a soon-to-be trillion-dollar industry. Links to Aiju's PDP-11/Unix emulator (for attempting compilation) and the Research Unix repository are provided for those wishing to delve into the history of computing.