Photographic Resource Center, Boston’s vigorous and independent photo non-profit, fulfills part of its wide-ranging mandate by offering superb research resources based in the Center’s Aaron Siskind Library. Open to all, the library houses over 4,000 photographic books and 80 periodicals from around the world, with a detailed online list of the holdings. The PRC’s many other activities are designed to engage a broad public with the art and ideas of photography. Located on the campus of Boston University, the PRC offers its members and the wider public up to eight annual gallery exhibitions, research resources based in the PRC’s Aaron Siskind Library and other unique events. If that were not enough, the PRC also hosts a web-based photo discussion forum, publishes In the Loupe, its stylish newsletter, and offers the annual Leopold Godowsky Jr. Color Photography Awards. Vigorous indeed!