All modern PCs provide SIMD processing but there are no practical programming books telling you how to use it. Use of these techniques can allow programs to run 8 to 10 times faster than conventional programs on the same computer. The book enables high-level language programmers to make effective use of a technology that at present is known to and utilised only by a handful of developers. They could write graphics programs that were much faster as a result. This will be of interest to practitioners of games programming, image processing, medical image analysis, video processing etc.