Microsoft never had a monopoly in operating systems ever in it's history either. You could install CP/M on IBM XTs and you could run OS/2 or Linux or a plethora

Microsoft never had a monopoly in operating systems ever in it's history either. You could install CP/M on IBM XTs and you could run OS/2 or Linux or a plethora of other UNIXes on later IBMs and clones instead of Windows. Doesn't mean they hadn't had market control due to it's market share.