The mouse cage was pretty funny. We knew mice would eat the insulation off the wires, so we got samples of all the wires that were available and put them in a cage with a bunch of mice to see which insulation they did not like. We only used wire that passed the mouse test.

What prepared you for building an electronic computer?

Remember, in that era, Philadelphia was "Vacuum Tube Valley." Radios and televisions were predominantly made in Philadelphia. I worked on primitive television at Farnsworth back as a teenager and at Penn I had been working on various radar problems trying to measure the time for a pulse to go out and come back. I figured that out with counters. All this is a good lead-in for building an electronic computer.

Was it you or was it the times?

Well, I may have been uniquely prepared. I was very good in math and I was fascinated with all electronics. I was designing electronic gadgets as a kid and I not only did academic math, I studied business math. Maybe I had the right fusion of interests. But every inventor stands on the pedestals built by other people. If I hadn't done it, someone else would have. All that any inventor does is accelerate the process. The main thing was we made a machine that didn't fail the first time. If it had failed, we might have discouraged this line of work for a long time. People usually build prototypes, see their errors and try again. We couldn't do that. We had to make it work the first time out.