Magnolia Chemical
Major Custom Cable
Malton Equipment
Invensys Controls
Marconi Communications
Marley Electric
Maryland Specialty Wire
McGill
McGraw-Edison
Metallics
Metalux
Metro Tel
MGE UPS Systems
Microtest
Midwest Electric Products
Milan Technology
Milbank
Millerbernd
Milwaukee Electric Tool Corp
Minerallac
Minuteman
Mitel
Modicon
Moldcast Lighting
Mohawk
MOSCOM/Veramark Technologies
Motorola
MRV Communications
MSD Inc.
Multi-Link
MultiTech Systems
MWS