Аннотация:The 17th International Conference on Computing in High Energy and Nuclear Physics (CHEP) was held on 21–27 March 2009 in Prague, Czech Republic. CHEP is a major series of international conferences for physicists and computing professionals from the worldwide High Energy and Nuclear Physics community, Computer Science, and Information Technology. The CHEP conference provides an international forum to exchange information on computing experience and needs for the community, and to review recent, ongoing and future activities. Recent conferences were held in Victoria, Canada 2007, Mumbai, India in 2006, Interlaken, Switzerland in 2004, San Diego, USA in 2003, Beijing, China in 2001, Padua, Italy in 2000.