| AIS
| AMP
| ARC
| ARRA
| | ASI
| AVO
| Aero Express
| Aeroflex / IFR
| | Agilent
| Amprobe
| Ashcroft
| Astro
| | Atlantis
| B&K Precision
| BFGoodrich / JCAir
| Barfield
| | Bendix
| Biddle
| Blue Point
| Boonton
| | Buchanan
| Burndy
| CDI
| Calibration Specialty
| | Castleberry
| Central
| Chatillion
| Collins
| | Craftsman
| Cushman
| DAC
| Daniels Manufacturing
| | Dillon
| Druck
| Dwyer
| EDMO
| | EDO
| ESI
| EZ Digital
| Edmac
| | Extech
| Fluke
| General Radio
| Helper
| | Hewlett Packard
| Hitachi
| Howell
| IFR / Aeroflex
| | JCAir
| Keithley
| Kellstrom
| Kenwood
| | King
| Kollsman
| Kustom
| LG Precision
| | Laversab
| Leader
| Linaire
| MAC tools
| | MEC
| Marconi
| Marsh
| Matco
| | McDaniels
| Meriam
| Michel
| Military
| | Mitutoyo
| Molex
| Motorola
| NSK
| | Narda
| North Atlantic
| Noshok
| Ohaus
| | Omega
| Optoelectronics
| Pacific Scientific
| Phillips
| | Pomona
| Proto
| Radio Shack
| Raychem
| | Ruska
| SPI
| Sargent
| Scheer Tumico
| | Sencore
| Shallcross
| Sigmation
| Simpson
| | Snap On
| Span
| Sphere Research
| Starrett
| | TIC
| Tektronix
| Tel Instruments
| Tenma
| | Tensitron
| Thomas & Betts
| Triplett
| Tronair
| | Tyco
| UEI
| USG
| United
| | Utica
| Wagner
| Wavetek
| Weinschel
| | Wika
| Wiltron
| Wulfsberg
|
|
