The proceedings of the XVth Conference on Applied Crystallography held in Cieszyn, Poland in August 1992 concentrated on two main fields. In the first field, special attention was paid to phase transformation in metal. In the second field, the papers dealt with methods such as quantitative phase identification, synchrotron technique and diffraction line analysis. A number of papers on computerization of experimental results, didactics and methodological problems are also included in this set of proceedings.