| | Plowman Products Inc Machine design, prototype, parts manufacturing, product engineering: electro hydraulic & pneuematic drives | |
| | Propulsion Systems Inc Industrial electric motors & drives | |
| | PSI Surface drives for boats | |
| | Radocy, P A & Sons Inc Cranes, drives & hydraulic equipment | |
| | Rainbow Electric Company Inc Distributes electrical equipment; company sells & services electrical equipment, including motors & variable speed drives & controls | |
| | Riverside Power Transmission Shaft mounted gear reducers & screw conveyor drives | |
| | Rodix Inc Solid state feeder controls, vibratory feeders & drives, photoelectric & proximity sensors | |
| | Schiffmann-Electrotek Inc Distributes electrical equipment; company is a wholesale distributor of electric motors & variable speed drives | |
| | Seagate Technology Inc Research & development laboratory: rigid magnetic disk & tape drives | |
| | Shaffstall Corp Floppy diskette & document conversion systems; converters; tape drives & conversion systems; magnetic tapes & tape backup units | |
| | Siemens Energy & Automation AC/DC drives, programmable controllers & industrial systems | |
| | Siemens Motion Controlled Contract manufacturing; printed circuit, CNC & plastic controls; programmable motor controllers; motors & drives | |
| | Siemens Westinghouse Tech Engineering services: automation drives & switch gears | |
| | Sommers Marine Service Engine repairing & rebuilding, out-drives & transmissions | |
| | Spicer Starter Drive Co Inc Automotive parts rebuilder: starter drives | |
