This sixth volume of the Crystallographic Computing series explores the application of windowing techniques and object-oriented programming to crystallography. Featuring presentations given at the renowned Vesprem School on Crystallographic Computing, the book covers a wide range of subjects regarding the state of crystallographic software, such as recent advances in powder diffraction techniques, structure and solution, and refinement. The tricky problem of dealing with disorder in the interpretation of diffraction data is given clear coverage. In addition, introductory sections explaining new features in program systems are included, and, in an age of ever-increasing quantities of data, the rationale behind the standardization and portability of crystallographic data through the use of CIF files is cogently defined. The book will appeal to crystallography teachers, students, and researchers interested in the latest computer applications in their field.