| 3Com | 3M | |
| Baco | Baird & Tatlock | Baldor |
| Balluff | Balston | Balzer, see Balzers |
| Balzers | Balzers Union | Banner Engineering |
| Barcopac | Barden | Barker & Williamson |
| Barksdale Inc. | Barr & Wray | Baumer |
| Baumer Electric | Beckhoff | Beckman Instruments |
| Belfab | Belling Lee | Belling-Lee |
| Bellingham & Stanley Ltd. | Berger Lahr | Berkleonics |
| Beta Squared | Bi Technologies | Bimba |
| Binder | Bio-Rad | Bird |
| Bird Electronic | Biscor | Bishop Wisecarver |
| Blomme | Blondelle | Blue White |
| BOC | Bodine | Boiswood |
| Bourns | BPS | Branson |
| Brecoflex | Brecooflex | Briskheat |
| British Telecom (see BT) | Brook Control Gear | Brook Crompton |
| Brooks Instruments | Brown Bouveri | Bruce |
| BSL | BT | BTI |
| Burgess | Burkert | Burndy |
| Burr Brown | Burrell Pneumatic | Buss |
| Bussman | Bussmann | |
| C & K | C&K | Cabletron Systems |
| Caburn MDC | Cajon | Cajon - See Swagelok |
| California | Cambridge Technology | Camfil Farr |
| Camille Bauer | Cannon | Canon |
| Cayman Systems | CB+B | Cbf |
| Ceep | Cegelec | Cehess |
| Celerity (Formerly Unit Instruments) | Cemco | Centralab |
| Cerac | CFW | Charntec |
| Chell Instruments | Chem-Tec | Cherry |
| Chessel | Cigol | Cinch Jones TRW |
| Cisco Systems | Cita | Ckd |
| CKD Corp | CLAL | CLC |
| Cleveland | Clippard | Cobrain |
| Comair Rotron | Comark | Comat |
| Comet | Comlinear | Compac Engineering |
| Compact Air Products | Compair Kellog | Compaq |
| Computacenter | Computer Products | Condor |
| Consolidated Bearings | Contact | Contaminatio |
| Contelec | Continental Industries | Continental Rubber |
| Controlasco | Convac | Convum |
| Cooke Vac | Coolidge & Kincaid - C&K (ITT Cannon) | Cooper |
| Copal | Copley Controls | Corcom |
| Cornell Dublier | Corning | Corteco |
| Coto | Coutant Electronique | Cravenmount |
| Crofton | Crydom | Cryo-Twenty |
| CTI (Helix Technology) | CTS | Cumana |
| Cuno | Cuthbertson | Cutler |
| Cutler Hammer | CVC | CVI |
| Kaco | Kalrez | Kanematsu Semi |
| KB Electronics | Keithley | Kent |
| Kepco-Tdk | Kevex | Keyence |
| Kingsway Tech College | Klixon | Klockner Moeller |
| Kobold | Koganei | Komatsu |
| Kontron Electronics | Kooltronic Inc. | Kopex |
| Kraus & Naimer | Kristel Corp | Krohne Corp |
| KRP | Ks Equipment Inc. | Kubler |
| Kuhnke | Kulicke And Soffa | Kuroda |
| Kurt J Lesker | Kyoei Denshi | |
| L'Unite Hermetique | Lab Facility | Lam |
| Lambda | Lascar | Laser Drive Inc. |
| Lauda | Lee Spring Co | Legrand |
| Legris | Leica | Leitz |
| Lemo | Lenze | Leodyne |
| Lewden | Leybold | LH Research |
| LI Components | Linear | Liteon |
| Littelfuse (Inc.) | Lucifer | Lufran |
| Lufran Inc | Lutze | |
| OCA Corporation | OCG Microelectronics | Ohmite |
| Oki | Olin Hunt | Olympus |
| Olyt | Omega | Omron |
| Ono Sokki | Optek | Optibelt |
| Optical Electrical Ind. | Opto22 | Orbis Technology |
| Orbitec | Oriel France | Oriental Motor |
| Oriental Motor (Vexta) | Origa | Orsam |
| Osram | Ove | |
| Qms | Qualidyne | Quality Precision |
| Quartzfab | ||
| UCC | Ulrick Matter | Ultratech |
| Ulvac | Unaxis | Unbranded |
| Unimation | Unimax | Uniphase |
| Uniphase/Cyonics | Unit Instruments | United Electric |
| Unitrode | Unitta | US Dynamics |
| US Gauge | Ushio | |
| Vac | Vacuum General | Vacuum Generators (Vg) |
| Vacuum Technology | Varian | Varta |
| Vat Valve | Vectron | Veeco Instruments |
| Veriflow | Verteq | Vesuvius Zya |
| Vexta | Victory | Vinyl Glass Ltd |
| Virax | Vishay | VWR |
| X-Acto | Xycarb Ceramics | Xycom |
| Yamada | Yellow Spring | Yokahama Kyoritsu Denki |
| Ziatech | Zilog | Zitel Corp. |
| Zurrer |
