Document delivery systems for article supply. Comparison of services and use

The essay compares the services and the use of three document delivery systems: RAPDOC, JASON and (the US-developed system) UnCover. Scope, contents, and quality of the available data as well as user groups, access and retrieval options are compared. Further, the essay describes the process of the actual document delivery and compares price structures. A final comparison makes clear that the differences between the tree systems are mainly to be found in the fact that each document delivery service was designed for a special purpose and for a different user group.