[TUHS] UNIX on Tandem

[Ronald Natalie via TUHS]

I guess T/TOS was the original name (Tandem / Transaction Operating 
System) but they tossed it for Guradian.


------ Original Message ------
From "Paul McJones" <paul at mcjones.org>
To "Ron Natalie" <ron at ronnatalie.com>
Cc tuhs at tuhs.org
Date 1/9/2026 1:38:12 PM
Subject Re: [TUHS] Re: UNIX on Tandem

>>Tandem’s architecture was an interesting one, but I had
>>not heard of a UNIX port to it.   Had it’s own, unlike anything else, 
>>OS
>>called TOS or something.
>
>The operating system was called GUARDIAN. The manuals are available 
>here:
>
>https://bitsavers.org/pdf/tandem/
>
>And this is an SOSP’81 paper about the design of the operating system:
>
>https://doi.org/10.1145/800216.806587