| | Data Cable Services Inc Telecommunications; company sells & installs voice & data communication systems | |
| | Engineering & Technical Svcs Satellite earth station, turnkey communication systems for voice, data & video | |
| | Hal Communications Corp Communication terminals, microcomputer & radio data communications systems | |
| | Kapes, Gordon Inc Signaling devices, data communication hardware, controls, converter modules & assemblies, closures, paging, relay & security systems | |
| | LXE Inc Radio linked data terminals & wireless data communication systems | |
| | SLD Services Ltd Telephone & other communication equipment sales; telephone systems & wiring services; paging sytems; data wiring | |
| | Systran Corp Shared memory data communication systems & I/O devices | |
| | Avaya Inc Remote technical support for data communication equipment | |
| | Electrodata Inc Data communication test & support equipment | |
| | Graybar Electric Co Inc Distributor of electrical & communication data equipment | |
| | Ideal Industries Inc Electronic controls, abrasives, connectors, cutters & data communication products | |
| | Miller, John Electric Co Industrial electrical contracting & data communication services | |
| | Quasitronics Inc Data communication equipment, data acquisition equipment & printed circuit board assembling | |
| | Tellabs Research Center Research & development: voice & data communication | |
| | United Universal Industries Electrical & power supply cords; data & communication cables | |
