Reviews computer storage devices designed to provide additional memory for microcomputers--chips, floppy disks, hard disks, optical disks--and describes how secondary storage is used (file transfer, formatting, ingredients of incompatibility); disk/controller/software triplet; magnetic tape backup; storage volatility; disk emulator; and…

Discusses the preservation of electronically produced data focusing on the passive destruction of data due to lack of proper care in information storage. Three case studies are presented: two involve specific media--magnetic tape and CD-ROM (compact disk read-only-memory)--and one the transfer of data from one system to another. (EM)