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Christian Crumlish is the curator of the Yahoo! Design Pattern Library and has been designing and writing about online user experiences since 1994. He is a director of the Information Architecture Institute, a member of the Open Web Foundation, and co-chair of the monthly BayCHI program.

He is the author of The Power of Many and co-author of Designing Social Interfaces with Erin Malone. He studied philosophy at Princeton and painting at the San Francisco School of Art, and lives in Oakland, California, with his wife, Briggs, and his cat, Fraidy.