| 3632 | ABRASIVE BLASTING OF METAL |
| 4279 | ABRASIVE DISC MANUFACTURE |
| 8106 | ABRASIVE METAL GRIT DISTRIBUTOR |
| 1438 | ABRASIVE METAL GRIT MANUFACTURE |
| 1748 | ABRASIVE WHEEL MFG. |
| 1748 | ABRASIVE WHEEL MFG.; CLAY MILLING; ROOFING GRANULES MFG; SILICA OR SLATE GRINDING |
| 5146 | ACCESS FLOOR INSTALLATION |
| 8803 | ACCOUNTANT, AUDITOR, FACTORY COST OR OFFICE SYSTEMATIZER - TRAVELING |
| 8010 | ACETYLENE GAS DEALER INCLUDING TANK FILLING |
| 5020 | ACOUSTICAL CEILING TILE INSTALLATION |
| 5479 | ACOUSTICAL MATERIAL INSTALLATION; INSULATION WORK NOC |
| 3574 | ADDING, COMPUTING, RECORDING, OFFICE MACHINE or COMPUTER MFG |
| 3574 | ADDING, COMPUTING, RECORDING, OFFICE MACHINE or COMPUTER MFG; SEWING MACHINE MFG; |
| 8800 | ADDRESSING OR MAILING COMPANY |
| 9063 | ADULT DAY CARE - ACTIVITY CENTER |
| 9053 | ADULT FOSTER CARE ASS'T LIVING & HOME FOR THE AGED |
| 7422 | AERIAL SURVEY |
| 9063 | AEROBICS INSTRUCTOR |
| 8059 | AEROSOL PACKAGING AS A SERVICE (IF DONE AS PART OF A PROCESS INCLUDE IN THE PROCESS CODE). |
| 3507 | AGRICULTURAL MACHINERY MFG; CONSTRUCTION MACHINERY, DREDGE, OR STEAM SHOVEL MFG NOC |
| 3507 | AGRICULTURAL MACHINERY MFG; CONSTRUCTION MACHINERY, DREDGE, OR STEAM SHOVEL MFG NOC; |
| 7422 | AIR AMBULANCE FLYING CREW |
| 7423 | AIR AMBULANCE GROUND CREW |
| 7405 | AIR CARRIER: SCHEDULED, SUPPLEMENTAL, OR COMMUTER: FLYING CREW |
| 7403 | AIR CARRIER: SCHEDULED, SUPPLEMENTAL, OR COMMUTER: GROUND EMPLOYEES |
| 3724 | AIR COMPRESSOR REPAIR AT CUSTOMER LOCATION |
| 3612 | AIR COMPRESSOR REPAIR IN SHOP |
| 5550 | AIR CONDITIONING OR HEATING INSTALLATION, SERVICE, OR REPAIR |
| 5550 | AIR CONDITIONING OR HEATING INSTALLATION, SERVICE, OR REPAIR - NON PORTABLE |
| 9519 | AIR CONDITIONING UNIT-PORTABLE INSTALLATION AND SERVICE |
| 3612 | AIR CYLINDER MANUFACTURE AND REPAIR |
| 9015 | AIR PURIFICATION BY OZONE PROCESS |
| 3620 | AIR TANK MANUFACTURE (OXYGEN, ACETYLENE, ETC) |
| 3612 | AIR TOOL MANUFACTURE AND REPAIR |
| 7423 | AIR TRAFFIC CONTROLLER |
| 5183 | AIR TUBE INSTALLATION - BANK |
| 9015 | AIRBNB RENTAL CLEANING |
| 8868 | AIRCRAFT GROUND SCHOOL-CLASSROOM ONLY |
| 9108 | AIRCRAFT OPERATION PASSENGER SEAT SURCHARGE |
| 7422 | AIRCRAFT OR HELICOPTER OPER: NOC: FLYING CREW; DRIVERS: AUTO RACING |
| 7423 | AIRCRAFT OR HELICOPTER OPERATION, GROUND EMPLOYEES: NOC |
| 7422 | AIRCRAFT OR HELICOPTER OPERATION: FLYING CREW-NOC, AUTO RACING DRIVER, FIRE FIGHTING - FLYING CREW |
| 7423 | AIRCRAFT OR HELICOPTER OPERATION: NOC: GROUND EMPLOYEES; AIRPORT OPERATOR |
| 7421 | AIRCRAFT OR HELICOPTER OPERATIONS, TRANSPORT OWN PERSONNEL FOR OWN BUSINESS - FLYING CREW |
| 7421 | AIRCRAFT OR HELICOPTER OPERATIONS: TRANSPORTATION OF EMPLOYERS PERSONNEL: FLYING CREW |
| 7423 | AIRCRAFT RADIO REPAIR OR ELECTRONIC INSTALLATION |
| 3076 | AIRCRAFT SHEET METAL PART MANUFACTURE |
| 7212 | AIRPORT SHUTTLE |
| 3372 | ALUMINUM ANODIZING |
| 3066 | ALUMINUM EXTRUDING |