Technological aspects of ferroelectric‎,‎ piezoelectric and pyroelectric materials are discussed in detail‎,‎ in a way that should allow the reader to select an optimal material for a particular application‎.‎ The basics of magnetostatics are described clearly‎,‎ as are a wide range of magnetic properties of materials ‎.‎‎.‎‎.‎ ‎.‎ ‎-Tony Harker‎,‎ Department of Physics and Astronomy‎,‎ University College London