John R. 'Trip' Adler III, (born 24 June 1984) is a US entrepreneur who cofounded the social publishing company Scribd. Adler grew up in Palo Alto, California, then attended Harvard University where he studied biophysics and graduated in June 2006. His father, John R. Adler, is a neurosurgeon at Stanford University and also an entrepreneur. After graduating from Harvard, Adler contemplated or actually launched various online ventures, including a ride-sharing service, a Craigslist-type site for colleges, a call center called 1-800-ASKTRIP, and a social media site called 'Rate your happiness.' The idea for Scribd occurred when Adler was at Harvard and talked with his father about the difficulties of publishing academic papers. He joined cofounders Jared Friedman and Tikhon Bernstam and they attended Y Combinator in Cambridge in the summer of 2006. Scribd was launched from a San Francisco apartment in March 2007.