A survey to identify numerical control postprocessors available at Department of Energy facilities is reported. The data are presented in the body of the report under the postprocessor identification. Information supplied includes the vendor name and address, the N/C and postprocessor languages, the machine tools and control unit supported, the computers used, and the identification of the DOE installation. The body of the report is followed by five indexes permitting users to refer to the postprocessor data by product number, DOE installation, machine tool, control unit, or computer. (RWR)