The aim of this book is to provide an introduction to the increasingly exploited technology of Hot Isostatic Pressing (HIPping). It is intended for two audiences. Firstly, the manufacturing or design engineer who may not have a materials science background, but who needs to develop an appreciation of the scope of the HIPping process. Secondly, the engineering or materials undergraduate who needs to understand how HIPping as a modern manufacturing method can offer potential improvements to material properties relative to more conventional techniques. In view of the breadth of potential readership the text is written as far as possible in such a way that technical terms are explained as the reader goes along. There is little mathematics and the focus is on discussing the principal issues. For the reader who wishes to pursue the subject a further reading section has been compiled. For the student, a number of worked examples are also provided. Most of the worked examples are accessible to anyone with a good grasp of A-level physics.