- Machine Shop & Tool Repair Service, Houston
- Machinery, Supplies & Equipment - Business Production Related, Houston
- Machinery, Supplies & Equipment - Business Supplies Related, Houston
- Machinery, Supplies & Equipment - Construction & Contractor Related, Houston
- Mailing, Delivery & Courier Service, Houston
- Malls & Shopping Centers, Houston
- Management Consultants & Services, Houston
- Manufacturing, Houston
- Manufacturing Products, Houston
- Masonry Materials & Supplies, Houston
- Massage Therapists & Professional, Houston
- Massage Therapy, Houston
- Men's Clothing Stores, Houston - Clothes & Accessories
- Mental Health Specialists, Houston - Psychologist, Psychiatrist, Psychotherapist, etc
- Millwork Contractors, Houston
- Minerals, Houston
|
- Mining, Houston
- Mining Contractors, Houston - Mining Companies, Contractors & Brokers
- Mining Development & Exploration, Houston
- Mining Services, Houston
- Mining, Crude-Oil Production, Houston - Mining Companies
- Mirrors, Houston - Custom, Framed, Bathroom, Vanity & Wall Mirrors
- Miscellaneous Agriculture, Houston
- Miscellaneous Industry, Houston
- Miscellaneous Professional, Houston
- Mobile Home Parks & Communities , Houston
- Motor Vehicle, Houston
- Motor Vehicle Rental & Leasing, Houston
- Moving & Storage Supplies & Equipment, Houston
- Moving Companies, Houston
- Moving Truck Rental , Houston
- Muffler Shop & Exhaust Systems, Houston
|
