Powerset on Sunday unveiled tools for searching Wikipedia that use conversational phrasing instead of keywords, marking the first step of its challenge to established web-search…

Senators Barack Obama and Hillary Clinton talked each other to a stalemate on Thursday night in what the Clinton campaign had hoped would offer a decisive breakthrough for her…

The dozens of entrepreneurs gathered for an exclusive high-tech conference in San Francisco this week all hoped to dazzle the crowd with their ingenuity. But one start-up,…