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this post was submitted on 15 Aug 2025
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Linux
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From Wikipedia, the free encyclopedia
Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).
Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.
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OpenVMS is still semi-maintained. It's DEC's old operating system that Windows NT draws some inspiration from because Microsoft hired a bunch of ex-DEC engineers.
There's also 9front, a fork of Bell Labs' Plan9.
Wegmans' checkout uses Toshiba 4690 OS, which I think is vaguely descended from CP/M.
I think IBM still maintains their i operating system, which used to be called OS/400.
Network equipment like enterprise routers and switches tend to run weird unique things, Cisco equipment runs IOS and Adtran equipment runs AOS.
Oh man a stew of them. Nice