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Linux really has come a long way
(lemmy.dbzer0.com)
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.
Community icon by Alpár-Etele Méder, licensed under CC BY 3.0
Let's get even more technical with MacOS X then. Which, btw, doesn't exist anymore as macOS 11 was released in 2020 (tho it still maintains the BSD-legacy in the same way Windows 10 does the NT legacy). It is based on the NeXTSTEP operating system from NeXT Computers, who Apple bought in the 90s to famously also bring Steve Jobs back into the fold. The initial release of NeXTSTEP occurred in 1989, pre-dating Windows and Linux...