Fifty-six years before Siri, the world briefly met the experimental Raytheon Executive Assistant 4000 -- a bot able to take dictation and tie a double-windsor knot. Answering to "Theo", this nimble bot could tap-dance on your Underwood typewriter to the tune of 95 words per minute. Alas, funding for the project was cut once it was revealed that his ability to answer spoken questions was achieved through a simple walkie-talkie hook-up to a crouching nearby Biff the engineer (who happened to be pretty good at talking like a robot).