Unix is the single user version of Multics, an operating system for that could handle multiple users simultaneously. The multi user stuff didn’t actually work great, but the other tech it had was great, so they made a single user version. The name was made to sound like it was Multics without the “Multi”.
Unix became a proprietary, paid operating system. Linus Torvalds took a Unix course at university and became interested in operating systems. He didn’t like that rules prevented him from actually modifying the Unix system even if he knew how. So he made his own free and open source version of the Unix operating system and named it after himself, because of his “big ego” as he puts it.
Now this is where I have to interject for a moment because, actually, Linus only wrote the kernel of the operating system. He didn’t write any of the common programs and tools. For that he used GNU software, which are all free and open source themselves.






What about goats in circular pens? A goat is tied to the fence of a circular pen. How long does the rope need to be so that the goat can reach exactly half of the pen’s area? What sounds like a high school math problem was eventually solved in 2020 via complex analysis.
Here’s the answer: