Computer based systems for the retrieval of data: crystallography
The article reviews four major computerised crystallographic databases: the Powder Diffraction File; Crystal Data; the Protein Data Bank and the Cambridge Structural Database. The Structural Datebase is described in some detail, Four retrieval systems: the Feldmann Seereh System; the DARC System; the TOOL-IR System and the Cambridge System, which have been applied to the Structural Datebase are discussed with illustrations of some typical search questions using the Cambridge System.