One of the interesting history of the PC was when Microsoft started selling their OS to clone makers. To hear Balmer tell it, it was frighting as IBM was making their PS2 machines more proprietary. They won and IBM os2 lost. I figured android was Google’s MSDos for mobile, but it seems the temptation of ad revenue is too strong (even showing up on windows..)

Linux is the answer though on mobile it’s just starting to be a little competitive.

“Steve Ballmer: We said ooh, IBM's probably not going to like this. This is going to threaten OS 2. Now we told them about it, right away we told them about it, but we still did it. They didn't like it, we told em about it, we told em about it, we offered to licence it to em.

Bill Gates: We always thought the best thing to do is to try and combine IBM promoting the software with us doing the engineering. And so it was only when they broke off communication and decided to go their own way that we thought, okay, we're on our own, and that was definitely very, very scary.”

https://www.pbs.org/nerds/part2.html