> I expect that by 1975, say, the number of high-end hardware installations was a lot more than 80. Are you sure? Wikipedia notes that for the Cray-1, release

> I expect that by 1975, say, the number of high-end hardware installations was a lot more than 80. Are you sure? Wikipedia notes that for the Cray-1, released in 1975, eventually "eighty Cray-1s were sold, making it one of the most successful supercomputers in history." https://en.wikipedia.org/wiki/Cray-1 https://en.wikipedia.org/wiki/Cray-1 Yes, yes, there's a difference between high-end mainframes and supercomputers, but there's also a difference between mainframes and the PDP-11, which is better categorized as a minicomputer. Personally, I find the dismissal of Multics to be less about reality and more about the perpetuation of pre-existing lore. The Xerox Star and Smalltalk also did not fare well in terms of commercial sales, but they tend to be lionized in computer history rather than treated as a joke.