Communicating Sequential Processes. The First 25 Years Theoretical Computer Science and General Issues : Springer : 9783540258131 : 3540258132 : 03 May 2005 : This volume, like the symposium CSP25 which gave rise to it, commemorates the semi-jubilee of Communicating Sequential Processes. 1 Tony Hoare's paper ?Communicating Sequential Processes? is today widely regarded as one of the most in?uential papers in computer science. To comm- orate it, an event was organized under the auspices of BCS-FACS (the British Computer Society's Formal Aspects of Computing Science specialist group). CSP25 was one of a series of such events organized to highlight the use of formal methods, emphasize their relevance to modern computing and promote their wider application. BCS-FACS is proud that Tony Hoare presented his original ideas on CSP at one of its ?rst meetings, in 1978. The two-day event, 7?8 July 2004, was hosted by London South Bank U- versity's Institute for Computing Research, Faculty of Busi