In 1947 Raytheon signed a contract to make their first computer. It would be their last... at least for many many years. The fruits of this contract was RAYDAC. Early digital computers were odd, to say the least. And RAYDAC distinguishes itself. From zig-zag delay lines to hunting tapes to freon cooling, it truly is a unique machine.

Selected Sources:

https://ed-thelen.org/McGee_Book-4.2.2.pdf - McGee on his experience programming RAYDAC

https://sci-hub.st/10.1109/JRPROC.1948.232626 - A Digital Computer for Scientific Applications

https://www.jstor.org/stable/2002859 - The Logical Design of RAYDAC

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