Serendipity has been voted one of the most popular words in the English language. It is also one of the hardest to translate. Conversationally, it is used as tantamount to luck, providence or chance. It has brought us Aspirin, the Pill, insulin, Viagra, penicillin, antihistamines and the smallpox vaccine, Scotchgard, Teflon, Velcro, Nylon, Ivory Soap, the Post-It note, and the technology behind the HP Inkjet printer. Google outgoing CEO Eric Schmidt liked to think of his online search tool as a "serendipity engine."