I'm not old enough to have used a vacuum tube (or valve, the lovely British word for them) computer, but I've developed an interest in these early systems. I h

I'm not old enough to have used a vacuum tube (or valve, the lovely British word for them) computer, but I've developed an interest in these early systems. I hope these circuit diagrams are scanned and become available some day. When reading about the EDSAC a while back, I realized that this was the computer on which Fred Holye based the computer he describes in "The Black Cloud", right down to it being housed in a former Anatomy School in Cambridge. I've wondered if Hoyle actually used the EDSAC or was just familiar with it enough to use it as a model for his fictional computer.