It's more than that. Burroughs was the mind-blowing innovator of the mainframe era. Look up the Burroughs B5000, which Alan Kay has been raving about for years as still in some ways more advanced than anything that has come since (or at least, anything popular). We had a few threads about it on HN a month or two ago; one of them was the article the GP is linking to. I highly recommend reading the whole thing.