Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. John M. Cowley (18 February 1923-18 May 2004), was an American Regents Professor at Arizona State University. The John M. Cowley Center for High-Resolution Electron Microscopy at Arizona State is named in his honor. John Cowley was an extraordinarily productive scientist over more than five decades. He made pioneering contributions in the fields of electron microscopy, diffraction and crystallography, all of which brought him widespread recognition.