Evaluation Criteria: The case study applications were examined and evaluated according to the following criteria: - Configuration: What are the components, and how sophisticated are the hardware requirements? - Description: What are the performance parameters that can serve as a basis for evaluation in the context of preservation needs and technological opportunities? - Operation: What can the system do, and how effective is it at integrating various media resources (text, number, graphic, image processing)? Are there built-in computer processing capabilities and/or the capability to call supplemental external (stand alone) programs? What is the nature of the user interface? - Assembly Process: Are there authoring capabilities for tailoring applications? How user friendly are these capabilities? - Attributes and Limitations: Can the information base grow (annotation, modification, system maintenance)? How is storage handled (technological obsolescence, archival stability)? Does the system permit browsing, nonsequential navigation (linear and/or nonlinear)? Is there a defined vocabulary (key words, synonyms)? Are key words or ideas (data fields, idea nodes, indexing, data lists) manually or automatically linked? Is there clarity of structure and is it conveyed to user (hierarchical, associative, relational), and can the user mark or trace paths (does the user leave a trail)? - Summary: How appropriate does the strategy seem for preservation applications? Case Studies HSPD: Summary CRISTAL: Summary PC-Hypertext: Summary