Windows XP thru 10, Xbox, Windows Phone and Azure are just a few of the things Ballmer oversaw. I am definitely missing a lot of things. But remember he over saw Microsoft as CEO for 14 years.
He may look and sound like a used car salesman but was anything but.
Yes, Nadella did end up removing Windows Phone but you had to give it to Ballmer for standing behind that thing even when it was, at times, very silly!
As an aside, that was something I think that is one idea Ballmer did ok on. The focus on developers as an admittance that Microsoft cannot do everything and that you need to help others work with them. Developers (x 3), may have been silly but it sure is a good stance to get behind.
By contrast, as much as Apple talks about the App store, they seem to be becoming more inward focused on a lot of things. For better or worse, we are yet to know.
He may look and sound like a used car salesman but was anything but.
Yes, Nadella did end up removing Windows Phone but you had to give it to Ballmer for standing behind that thing even when it was, at times, very silly!