I ran across this article recently:
and learned a few things. First, this machine ran at about 1 MHz. ONE Megahertz. And they were using this to develop speech recognition software?
Second, the memory was originally built with CRT tubes.
And third, they had pointers! In the hardware specs! Hello, Object-oriented programming abou 40 years before it came into vogue!
It's a neat article to skim, at least.