encyclopedia

CATALOG OF FEDERAL DOMESTIC ASSISTANCE

A catalog published annual by the U.S. Office of Management and Budget. It presents a comprehensive listing and description of federal assistance programs administered by different federal departments, agencies, commissions, and councils. (TRB)

CATEGORICAL EXCLUSION

National Environmental Policy Act of 1969 categories of action that are exempt from preparing an environmental impact statement. (TRB)

CATENARY SYSTEM

System of overhead wires in which the contact wire is supported from one or more longitudinal messenger wires either directly by hangers (simple) or by hangers in combination with auxiliary conductors and clamps (compound). Attachment of the contact wire to…

CATHODE RAY TUBE

The picture tube of a computer monitor. Also a terminal attached to a multi-user computer, such as a mainframe.