About 250 attendees from all walks of life arrive at Googleplex in Mountain View, California, on a Friday for a weekend educational program — except there’s no program in place for them. And that’s intentional. Science Foo Camp — the “Foo” stands for “Friends of O’Reilly,” referencing publishing company O’Reilly Media, which hosts the event in collaboration with Google, Nature Publishing Group, and Digital Science — has been held annually since 2005 as part of a series of Foo Camps, including Social Science Foo Camp and the original Foo Camp that launched in 2003 as a hacker “unconference.”