Holography has recently achieved new importance as a means of providing the data necessary for the development and validation of computer models. Increasingly, design work is being performed through the application of complicated three-dimensional models to gas flow prediction and the use of finite-element models for investigation of mechanical behaviour and stress. This paper reviews the many applications of holography that have been developed at Rolls-Royce over the past 20 years. These cover all of the major fields within holographic interferometry; flow visualisation, nondestructive testing, vibration analysis, and holographic contouring. Of equal interest with the techniques themselves are the problems encountered and overcome in applying these techniques in a demanding and at times hostile industrial environment away from the laboratory. The extensive use of high-power pulsed lasers has greatly facilitated this move and has allowed holography to be used routinely in normal component test areas.