Example image of eyePlorer eyePlorer map for 'Version 6 Unix': Bell Labs Operating system Unix Source code University of California, Berkeley University of New South Wales John Lions Lions' Commentary on UNIX 6th Edition, with Source Code PDP-11 Ancient UNIX systems BSD licenses SCO Group INTERACTIVE Systems Corporation 32 Australia University of Wollongong C (programming language) Compiler Porting Hypervisor Multi-Environment Real-Time Real-time operating system Microprocessor Kernel (computing) University of Sydney Berkeley Software Distribution Eastern Bloc MNOS Soviet Union BKUNIX Elektronika BK ANSI C Massachusetts Institute of Technology Pedagogy X86 Xv6 PostScript Interdata 7/32 and 8/32 DEMOS C shell Idris (operating system) Whitesmiths Magic number (programming) Version 7 Unix PWB/UNIX List of BSD operating systems Thompson shell Kernel panic V6 (disambiguation) Crypt (Unix)