The document discusses the evaluation of library software and its impact on library services. It outlines the scope of library automation and technological trends affecting libraries. Key areas of library software functionality are examined, including acquisition, cataloguing, circulation, serials control and OPAC. Classical retrieval systems like CDS/ISIS and integrated library software packages like Libsys are described and their limitations discussed. The conclusion emphasizes that no software can meet all library requirements and customization takes time, so prioritizing needs is important when evaluating options.