This masters thesis concerns three different types of cataloguing within three different memory institutions museums, archives and libraries. The focus lies on the cataloguing elements which are compared in order to illuminate similarities and differences. The Regional Archive and The National Museum of World Cultures - both in Gothenburg - were chosen and compared to KRS, the Swedish counterpart to the Anglo-American Cataloguing Rules, AACR2, 2: nd ed. The purpose of this comparison is partly to display the elements in order to make students disciplines, but also the staff within archives, libraries and museums to become conscious of each others cataloguing methods in regard to future cooperations within the memory institutions and to see if it is possible to create common cataloguing rules for archives, libraries and museums. The questions asked in this thesis are: 1. Do differences and similarities between the cataloguing element of the memory institutions exist, and if so, which are they? 2. Would it be possible to create common cataloguing rules for these institutions and is this desired? The examination was made in situ, because the cataloguing elements of the above mentioned archive and museum do not exist in print. The analysis showed that there were similarities concerning the describing elements and that the differences consisted of elements that are not considered as describing and some of these were classification elements. This can also be considered as the conclusion answering the first question. The conclusion regarding the second question is that it is possible to create common cataloguing rules for archives, libraries and museums, but that there are cooperative problems which have to be solved within the memory institutions before it can become reality.