Radar; Integrated Electronic Displays; Digital Computers; Computer Peripherals-Namely, Tape Drives, Discs, Printers and Display Terminals; Sonar; Laser Rangefinders; Radio Telecommunication Systems Whose Major Components Are Transmitters, Receivers, and Transceivers for Voice, Video and Data; Military Command and Control Systems Whose Major Component Is a Central Computer for Gathering Data From, and Presenting Data to, Remote Terminals; Airborne and Marine Omega Radio Navigation Systems Whose Major Components Are Receivers, Signal Processors and Read-Out Equipment and Parts of Each of the Above