I think, the Atlas was the first machine to support virtual memory (https://en.wikipedia.org/wiki/Atlas_%28computer%29 https://en.wikipedia.org/wiki/Atlas_%28co

I think, the Atlas was the first machine to support virtual memory (https://en.wikipedia.org/wiki/Atlas_%28computer%29 https://en.wikipedia.org/wiki/Atlas_%28computer%29), but I am not entirely sure when Burroughs first released a machine with virtual memory. Atlas was - according to Wikipedia - first operational in 1962.