- Northstar Technologies
- Acton
Produces electronic navigation equipment for marine, avionics, agricultural, recreational, and other emerging land-based markets.
www.northstarcmc.com
- Megapulse, Inc.
- Billerica
Radio navigation systems and Loran-C transmitters.
www.megapulse.com
- Map Shack Corporate Headquarters
- Winchester
Retail and mail order operation specializing in U.S.G.S. topographic maps, state and regional atlases, special order maps, and books.
www.wendellcenter.com/maps
- OuterLink Corporation
- Concord
Wireless data company providing real-time GPS tracking and two-way data messaging for fleets of vehicles, ships, and aircraft.
www.outerlink.com
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