I'm just reading Tim Bray's article about management approval as a potential predictor of the success of new technologies and noticed the Google ads on that page. Amusingly, at the time of writing, they're all to do with fertility treatments and ovulation and stuff, presumably because the page mentions AI. He means artificial intelligence, not artificial insemination, of course. It's a good example of how homonyms can cause problems for search engines. Not an easy problem to solve, either. Isn't natural language a bastard?