Optical Disk Storage: Aside from their ability to accommodate massive volumes of data (200 to 1000 megabytes), the non-erasable disk technologies offer a distinct advantage to preservation applications. These storage technologies can facilitate access to historic documents that would otherwise be too valuable or fragile to permit even limited dissemination or handling. As a result, these these historic materials can play vital roles in the cultural resource management decision processes without risk to their integrity. A number of the optical disk technologies seem to promise archival durability and data stability along with rapid access time and economy of data structure. However, the technologies are so new and progressing so quickly that there are no application track records to corroborate the accelerated wear testing done under laboratory controls. These tests simulate a variety of conditions expected to be encountered in normal use, as well as conditions resulting from cataclysmic events and extreme environmental forces. As a measure of the durability and stability of the physical storage medium and the stored data, the veracity of these tests is critical to integrity of archival data. As a consequence, the decision to make the significant financial investment required to implement these technologies as part of an integrated information system should be carefully considered. Storage Standards CD-ROM Storage WORM Storage Analog Storage CRISTAL: Configuration Interface Evolution Optical