As fall arrived and school began, D'Aloisio felt immense pressure to deliver for his backers. He needed to whip his algorithm into better shape, so he contracted a team of Israeli coders who specialize in natural language processing. Searching on Google, he found and hired a retired professor living in Thailand who'd written seminal books on the topic. 'He became our main scientist,' says D'Aloisio. 'He now works at Yahoo! in the Sunnyvale office.'