COMPARISON OF SOME WIDESPREAD CDROM INFORMATION RETRIEVAL SOFTWARE PACKAGES Available to Purchase

Until recently there were very few publications dealing with comparison of different CDROM information retrieval software packages (Richards & Robinson 1993). The few exceptions (e.g. Harry & Oppenheim 1993; Jacsó 1991; McFaul 1992; Tian‐Zhu 1991; Zink 1991) mostly deal only with the principles of such comparisons, not with actual comparisons, and mostly only with user interfaces, not with the software as a whole. They usually give collections of rules — how to rank the CDROM publications, how to give ‘award marks’ to them — but this usually characterises CDROM publications and databases, not the software itself. Moreover, the performance factors, the properties most important for professional searchers, are usually completely missing from these collections of rules.