Happy Birthday, IBM PC! 30 today!
And haven't you done well? A lot better than MS-DOS did, anyway...
I measure that by your legacy. This netbook I'm typing on - and my desktop machine - are still shaped by decisions in your design. From the CPU's ISA to the I/O systems to the fact that the keyboard has a Scroll Lock key on it...
Oh, wait, my netbook doesn't have a Scroll Lock key on it. But it does have Sys Rq, which I think I used once many years ago on a 286 machine.