The greatest flops in computer history
telegraph.co.uk
telegraph.co.uk
Xerox Alto: I don't think I need to mention all the stuff developed in PARC that is now utterly ubiquitous.
Apple Lisa: A big influence on her more famous brother, the Macintosh.
Sinclair QL: Helped Linus Torvalds to decide to target Linux initially at the x86.
NeXT: Spawned OS X ; kept Steve Jobs in the computer industry until his return to Apple.
Imagine a world with no Microsoft and IBM having a 70% share instead of being just another consultancy.
My bet is that if there was no MS-DOS, one of the others would have risen in its place.
(Another way to think about it: If IBM had retained license to DOS, the only 2 laptops you could buy today would be Apple & Lenova.)