| Modular Homes | 363 |
| Molasses | 363 |
| Mold & Mildew Services | 363 |
| Moldings | 363 |
| Money Transfer Service | 363 |
| Monograms | 363 |
| Monuments | 363 |
| Mopeds | 363 |
| Mortgages | 363 |
| Motels | 367 |
| Motion Picture Equipment & Supplies | 367 |
| Motion Picture Film Distributors & Exchanges | 367 |
| Motor Homes | 367 |
| Motor Homes-Renting & Leasing | 367 |
| Motorcycles & Motor Scooters- New & Used | 368 |
| Motorcycles & Motor Scooters- Painting & | 368 |
| Customizing |
| Motorcycles & Motor Scooters- Repairing & | 368 |
| Service |
| Motorcycles & Motor Scooters- Supplies, Parts & | 368 |
| Accessories |
| Movers | 369 |
| Moving Equipment & Supplies | 372 |
| Moving Equipment Rental | 372 |
| Moving Services-Labor & Materials | 372 |
| Moving Supplies | 372 |
| MRI Magnetic Resonance Imaging | 372 |
| Mufflers & Exhaust Systems | 372 |
| Mulches | 372 |
| Museums | 372 |
| Music Instruction-Instrumental | 373 |
| Music Instruction-Vocal | 373 |
| Music-Sheet | 373 |
| Musical Instruments-Dealers | 374 |
| Musical Instruments-Repairing | 374 |
| Musicians | 374 |
| Mutual Funds | 374 |
| N |
| Nail Salons | 374 |
| Name Plates | 375 |
| Naval Architects | 375 |
| Needlework & Needlework Materials | 375 |
| Nets & Nettings | 375 |
| Network Consultants | 375 |
| Newspapers | 376 |
| Nightclubs | 376 |
| Nightclubs-Information Service | 377 |
| Noodles | 377 |
| Notaries-Public | 377 |
| Novelties | 378 |
| Nurseries-Plants, Trees, Etc | 378 |
| Nursery & Growers’ Equipment & Supplies | 378 |
| Nursery Stock Dealers- Whsle & Growers | 378 |
| Nurses | 378 |
| Nurses’ Registries | 379 |
| Nurses’ Schools | 379 |
| Nurses’ Supplies | 379 |
| Nursing Homes | 379 |
| Nutritionists | 379 |
| O |
| Occupational Therapists | 379 |
| Oceanographers | 379 |
| Office & Desk Space Rental | 379 |