|
| 3694 | Airplanes, toy, manufacturing | |
| 6301 | Airport baggage handling | |
| 6301 | Airport cargo handling services | |
| 4520 | Airport construction (except building) | |
| 6303 | Airport hangar rental | |
| 7010 | Airport leasing, if not operating airport | |
| 3110 | Airport lighting transformers, manufacturing | |
| 6021 | Airport limousine service scheduled | |
| 6303 | Airport operations | |
| 6303 | Airport operators, non-military | |
| 4520 | Airport runway construction, general contractors | |
| 9000 | Airport runway maintenance service | |
| 6303 | Airport terminal services | |
| 6303 | Airport, civil, operation and maintenance | |
| 3312 | Airspeed instruments (aeronautical), manufacturing | |
| 1410 | Alabaster mining | |
| 5150 | Alarm and signal systems and devices, electronic (except household smoke detectors), wholesale | |
| 5150 | Alarm apparatus, electric (except electronic systems), wholesale | |
| 5110 | Alarm apparatus, electric, wholesale agents and brokers | |
| 3330 | Alarm clocks, manufacturing | |
| 5150 | Alarm signal systems, wholesale | |
| 7492 | Alarm system monitoring | |
| 3190 | Alarm systems and equipment, manufacturing | |
| 7492 | Alarm systems sale, combined with installation, maintenance or monitoring | |
| 4530 | Alarm systems, electric (fire, burglar), installation | |
| 2221 | Albums (e.g., photo, scrap), manufacturing | |
| 5139 | Albums (photo) and scrapbooks, wholesale | |
| 8519 | Alcohol treatment, outpatient clinics | |
| 1551 | Alcohol, ethyl (ethanol), non-potable, manufacturing | |
| 5149 | Alcohol, industrial, wholesale | |
| 2411 | Alcohol, methyl (methanol), manufacturing | |
| 8532 | Alcoholic and drug addiction self-help organizations | |
| 7513 | Alcoholic beverage control boards, provincial government | |
| 1551 | Alcoholic beverages (except brandy), distilling | |
| 5122 | Alcoholic beverages, wholesale | |
| 5110 | Alcoholic beverages, wholesale agents and brokers | |
| 8532 | Alcoholism counselling, nonresidential (except medical treatment) | |
| 8531 | Alcoholism rehabilitation centres, residential | |
| 8511 | Alcoholism rehabilitation hospitals | |
| 8519 | Alcoholism treatment clinics, out-patient | |
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