- Tritronics, Inc.
 - Abingdon - Distributor parts and accessories for consumer electronics. - Communication Solutions, Inc.
- Baltimore - Product areas are microwave and VHF/UHF receivers, milli-meter wave downconverters, and related equipment.
- Philtec, Inc.
- Arnold - Fibre optic displacement sensors to measure distance.
- Soundscape Audio/Video Specialists
- Baltimore - Design and installation of home and office audio/video systems, home theatre and entertainment centres.
- Creative Marketing Associates, LTD
- Columbia - Electronic test and measurement equipment manufacture's representatives serving Maryland, Virginia, and Washington, DC.
- Listening Room
- Pikesville - Information on designing a stereo system, store hours and specials.
- Chesapeake Lighting
- Columbia - Representative of over 40 lighting and lighting controls manufacturers.
- Third Wave Solutions
- Columbia - Represent manufacturers of active and passive components and power supplies.
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