| 388558 | 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 | Cha |
| 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) | CTI - Cryogenics |
| 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 | 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 | Lexmark | 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/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 |
