| 3M | FEDERAL PACIFIC | OLSUN ELECTRIC |
| FEDERAL SIGNAL | OMRON | |
| A | FERRAZ SHAWMUT | OSECO |
| AB CHANCE | FLUKE | OSHKOSH TOOLS |
| ABB | FRIGIDAIRE | OZ GEDNEY |
| ACME | ||
| ACTION INSTRUMENTS | G | P |
| ACTION-AIRE | G.E. | PANASONIC BATTERIES |
| ADALET PLM | GARDNER-BENDER | PANDUIT |
| ADVANCE BALLAST | GAYESCO | PASS & SEYMOUR |
| AEMC | GE ALSTHOM | PHILIPS |
| AERO TEC LABORATORIES | GE APPLIANCE PARTS | PLYMOUTH |
| AGASTAT | GE MULTILIN | PORCELAIN PRODUCTS |
| AIRMASTER | GENERAL CABLE | POST CLOVER |
| AIW | GMP | POTTER & BRUMFIELD |
| ALCAD BATTERIES | GOULD SHAWMUT | PYLE NATIONAL |
| ALCATEL | GRAPHIC CONTROLS | |
| ALEMITE | GREENLEE | R |
| ALLEN BRADLEY | RAYCHEM | |
| ALPHA WIRE | H | RAY-O-VAC |
| ALUMA-FORM | HALO LIGHTING | RELIANCE |
| AMCI | HALOPHANE | RITTAL |
| AMP | HAPCO | ROCKWELL AUTOMATION |
| AMPROBE INSTRUMENTS | HARTMANN & BRAUN | ROLATAPE |
| ANDERSON | HASTINGS | |
| ANICOM | HAWKER CABLE GLANDS | S |
| ANTENNA SPECIALISTS | HELUKABLE CABLE | S&C ELECTRIC |
| AO SMITH | HOFFMAN | SANYO BATTERIES |
| APPLETON | HP | SELECTA SWITCH |
| AQUA-CHEM | HUBBELL | SHAT-R-SHIELD |
| ASCO | HUBBELL WIRING DEVICES | SIECOR |
| AVO | SIEMENS | |
| I | SIMPLEX | |
| B | IDEAL | SIMPSON |
| BASHLIN | INTERMATIC | SNAP-ON TOOLS |
| BELDEN CABLE | IPC | SOLAR HD |
| BELL LUMBER | IRON AGE BOOTS | SPERO |
| BIRD | SQUARE D | |
| BLACK & DECKER | J | STEEL CITY |
| BLACKBOX | JASCO PRODUCTS | SURE-LITE BATTERIES |
| BLACKBURN | JEFFERSON BALLAST | SYLVANIA OSRAM |
| B-LINE | JOSLYN | |
| BRADY | T | |
| BRIGHT STAR | K | T&B |
| BRYANT | KILLARK | TAPESWITCH |
| BUCHANAN | KLEIN TOOLS | TCI |
| BUCKINGHAM | KLOCKNER MOELLER | TELEDYNE |
| BURNDY | TELEMECANIQUE | |
| BUSSMANN | L | THERMOWELD |
| LASKO | TIME MARK | |
| C | LEDTRONICS | TORK |
| CANON | LEVITON | |
| CARLON | LINKSYS MODEMS | U |
| CAROL CABLE | LITHONIA LIGHTING | UNIVERSAL |
| CHALLENGER | LITTLEFUSE | US ELECTRIC |
| COOPER LIGHTING | LOUIS ALLIS | |
| COOPER TOOLS | LUMAX | W |
| CORDLEY & HAYES COOLERS | WALTON | |
| CORNING | M | WEG MOTORS |
| CRC TOOLS | MAGNETEK | WEIDMULLER |
| CROMPTON INSTRUMENTS | MARSH | WELLMAN |
| CROUSE HINDS | McGILL | WESTMORELAND |
| CURLEE | McGRAW EDISON | WHEATLAND |
| CUTLER HAMMER | MICHIGAN LADDER | WIREMOLD |
| MICRO SWITCH | WOODHEAD | |
| D | MOTORTRONICS | |
| DAYBRITE | MTE | Y |
| DELL | YUASA BATTERIES | |
| N | ||
| E | NGK | Z |
| EAGLE-PICHER | NORTH PACIFIC | ZAPAK STRAPPING TOOL |
| EDWARDS | N-TRON | |
| ELECTROMODE | ||
| ERICO | O | |
| EXIDE BATTERIES | OCAL | |
| OHIO-BRASS | ||
| F | OKONITE | |
| FARADAY | OLFLEX CABLE |