Speech technology is an area of immense commercial relevance and central to the growth of multimedia systems. This text provides a comprehensive tutorial review of the core speech technologies together with the means for integrating them into systems and the main commercial drivers and applications. From an introduction to the basic terminology and underlying techniques, the text moves on to demonstrate the core enabling technologies, with a broad and balanced perspective given for each topic. Subsequent chapters focus on the applications and give an insight into the process of integrating a range of speech technologies for commerical solutions to customer needs. The text concludes with a speculative review of options for the future.