The Mac's desktop speech recognizer, which is so old most Mac users don't even know exists, even tells knock-knock jokes (in response to "tell me a joke" -- the

The Mac's desktop speech recognizer, which is so old most Mac users don't even know exists, even tells knock-knock jokes (in response to "tell me a joke" -- the script it follows is in ~/Library/Speech/Speakable Items). And this has been a feature of Mac OS since the pre-OSX days.