Of course, in hindsight the rodentiometer is an obvious input for the computer. One wonders how long it would have taken somebody else to invent this, if English didn't exist. How "ripe" was the community for this idea to surface?
Well, at least I always wonder with such inventions. How long have all the prerequisites been there? How large a problem has been solved? How many people had that problem? How incremental was the advancement?