this paper is about parallel programming practical parallel programming practical parallel programming by Greg Wilson is intended for scientist interested in implementing is interested in implementing Real world applications on parallel computers but but were not familiar with different approaches this book is particularly help Facebook is particularly helpful to those who have program parallel machines using a single barrel using a single paradigm are frustrated with the shortcomings of the paradigm and means of the paradigm and who would like to experiment with other techniques in that with other techniques in their applications practical parallel programming is also used programming is also useful to system designers as a survey of various Pal survey of various parallel Programming Paradigms with their systems will have systems will have to support efficiently