Multics had modes per file (https://multicians.org/fjcc4.html) but i don't know about the origins. the simpler approach of owner/group/other is a purely Unix creation and i would bet Ken Thompson is behind it all.

i would love to know more.

-rodri

On Wed, Jul 31, 2019, 12:00 PM Stephan Han. <xenonelive@gmail.com> wrote:

Hello Unix enthusiasts.

I'd like to know who or the group of people behind implementing this filesystem permission system.
Since we are using this system for nearly 40 years and it addresses all the aspects of the permission matter without any hustle.
I'm inspired to know who/how came up with this theory?
Also if it derived from somewhere else or If there's an origin story about this, it would be worth to share.

Cheers.
Stephan

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