This report delineates the theory and terminology of data compression. It surveys four data compression methods--null suppression, pattern substitution, statistical encoding, and telemetry compression--and relates them to a standard statistical coding problem, i.e., the noiseless coding problem. The well defined solution to that problem can serve…

A series of 11 articles describes information technologies being used in the U.S. Congress, the impact of these technologies, and possible future developments. Included are a chronology of key actions affecting congressional information support and a list of readings in information technology and Congress. (CLB)

This report presents findings of a demonstration project that tested the concepts and applications of linking student records using social security numbers with state unemployment insurance (UI) wage and other data sources. It also contains information of value to policymakers, state and local administrators, practitioners, and consumers of…