Before Bill Gates there were a lot of great OS. Bill Gates just bought MS DOS and killed all other OS competition. He is not a talented programmer, he is a just a rich kike who ruined the free market for all OS.
He is doing the same now with Covid-19 mRNA vaxx and with food farms supplies. He is not a doctor or agronome, he is just buying everything people need to survive and destroys it.
If you were born after gen X, you don't know how it started with MS DOS destroying the OS free market. Bill Gates is extremely dangerous. Only his death will save humanity from more sufferings.
When IBM began developiing the IBM PC 5150, they tried to secure a license to CP/M, but Digital Research didn't like the proposed terms of the deal. So IBM turned to Microsoft, which licensed a product called 86-DOS from Seattle Computer Products (SCP). Some months later, Microsoft purchased 86-DOS outright for $50,000.
86-DOS became IBM PC-DOS when it shipped with the IBM PC in August of 1981.
When I bought my 386 PC in 1991 it had IBM Dos 3.3
MS retained the right to sell it themselves too. When Compaq clean room reverse engineered the IBM Bios and created the PC clone in 1988 they also shipped it with MS-DOS. It was this clone market that really entrenched Microsoft.
I *bought* my first Linux distro, Yggdrasil, in 1993.
It was the *Applications* that pushed the market to PC Clones, particularly Lotus 1-2-3 and Wordstar
DR-Dos was never that big a threat - despite MS' dirty tactics.
It was Windows 3.1 that really did it.
They were exciting times and end useres didnt realy care about the OS, it was such a small price compared to the hardware. My 386 with 1Mb RAM and 40MB hard disk was £2000 / $1200 in 1991 and the DOS was 1% of the cost. At the PC shop I worked in, we had piles of 5" DOS floppies