| 992 15 | AIR QUALITY MONITORING EQUIPMENT TESTING AND CALIBRATION SERVICES |
| 992 19 | AUTOMOTIVE AND ROAD EQUIPMENT TESTING AND CALIBRATION SERVICES |
| 992 22 | BALLISTICS TESTING SERVICES |
| 992 26 | BIOLOGICAL AND MICROBIOLOGICAL TESTING SERVICES |
| 992 31 | CHEMICAL TESTING SERVICES (SEE 962-22 FOR LABORATORY TESTING) |
| 992 34 | CONCRETE TESTING SERVICES |
| 992 36 | CORE SAMPLE, NOT CONCRETE, TESTING SERVICES |
| 992 39 | ELECTRICAL SYSTEMS TESTING SERVICES |
| 992 40 | ELECTRONIC AND ELECTRICAL CABLE TESTING SERVICES |
| 992 45 | GASEOUS FUEL TANK TESTING SERVICES, VEHICULAR |
| 992 47 | HVAC SYSTEM TESTING, BALANCING AND TROUBLESHOOTING SERVICES |
| 992 49 | LIGHT MEASUREMENT EQUIPMENT TESTING AND CALIBRATION SERVICES |
| 992 53 | MEDICAL EQUIPMENT TESTING AND CALIBRATION SERVICES, NOT X-RAY |
| 992 55 | MISCELLANEOUS TESTING AND CALIBRATION SERVICES |
| 992 58 | OFFICE EQUIPMENT TESTING SERVICES |
| 992 59 | OIL FIELD EQUIPMENT TESTING SERVICES |
| 992 61 | PAINT TESTING SERVICES |
| 992 65 | PRESSURE TESTING SERVICES, FUEL TANKS, PRESSURE TANKS, ETC. |
| 992 70 | RADAR EQUIPMENT TESTING AND CALIBRATION SERVICES |
| 992 71 | RADIO INSTRUMENT TESTING AND CALIBRATION SERVICES |
| 992 72 | RETURN MERCHANDISING AUTHORIZATION TESTING SERVICES |
| 992 75 | SAFETY EQUIPMENT TESTING AND CALIBRATION SERVICES |
| 992 77 | SCIENTIFIC EQUIPMENT TESTING AND CALIBRATION SERVICES |
| 992 83 | TEXTILE TESTING SERVICES |
| 992 87 | UNDERGROUND LEAK TESTING SERVICES |
| 992 90 | VIDEO INSTRUMENT TESTING AND CALIBRATION SERVICES |
| 992 97 | X-RAY EQUIPMENT TESTING AND CALIBRATION SERVICES |