[en] The accounting and safeguards system for nuclear materials used at the Rossendorf Central Nuclear Research Institute is based on national directives and decrees. The adaptation of the system to the Safeguards Agreement with the Agency, in connection with the accession of the German Democratic Republic to the Treaty on the Non-Proliferation of Nuclear Weapons, has merely required some minor amendments: at the same time, however, it has made necessary extensive preliminary work for the purpose of devising the clearest possible and non-time-consuming method of recording data. Experience already gained indicates that the safeguards system as developed fulfils its purpose. The overall labour requirement is about 0.5 man-years. Work is being done to improve the system further by cutting down the time expended. Besides giving a general description of the system, the authors discuss the data forms used in operating it. (author)