[TUHS] Another Unix Archive addition: KSOS

[Andrew Lynch via TUHS]

Hi,Since KSOS was developed by the US Government at tax payers expense, is the KSOS source code public domain?
Released under some open source or free license?



    On Saturday, June 27, 2026 at 07:57:04 PM EDT, Warren Toomey via TUHS <tuhs at tuhs.org> wrote:  
 
 We have added a new system to the Unix Archive: KSOS

https://www.tuhs.org/Archive/Distributions/Other/KSOS/

KSOS was the U.S. Department of Defense (DoD) Kernelized Secure Operating
System (KSOS, formerly called Secure UNIX). KSOS is intended to provide
a provably secure operating system for larger minicomputers.

Thanks to Tom Perrine who had the tarball and sent it to John O Goyo,
to John O Goyo who sent it in to TUHS and to Thalia Archibald who
curated it and put it into the Unix Archive.

Cheers, Warren