Part 1 presents the chemistry, physics, and engineering technology associated with magnetic and optical disks. This part explores the subjects of archiving, security, validation and certification, and protection. Questions and issues are raised in each of the areas that both users and vendors should be aware. (JN)

Provides basic information on videodisks and potential applications, including inexpensive online storage, random access graphics to complement online information systems, hybrid network architectures, office automation systems, and archival storage. (JN)