- Machine Shop & Tool Repair Service, Laconia
- Machinery, Supplies & Equipment - Business Production Related, Laconia
- Machinery, Supplies & Equipment - Business Supplies Related, Laconia
- Machinery, Supplies & Equipment - Construction & Contractor Related, Laconia
- Major Appliances, Laconia - Household & Kitchen
- Management Consultants & Services, Laconia
- Manicurists & Pedicurists, Laconia
- Manufactured & Mobile Home Movers & Transporting, Laconia
- Manufacturing, Laconia
- Manufacturing Products, Laconia
- Marinas & Marina Services, Laconia
- Marine Surveyors & Adjustors, Laconia
- Marriage & Family Counselors, Laconia
- Martial Arts & Self Defense Schools, Laconia
- Masonry Contractors, Laconia - Stone Mason, Brick Mason - Install & Repair
- Massage Therapy, Laconia
- Meat Market, Wholesale & Products, Laconia
- Mechanical Contractors, Laconia - Install, Service & Repair
- Medical & Health Service Organizations, Laconia
- Medical Supplies & Equipment, Laconia
- Membership Sports & Recreation Clubs, Laconia
- Mental Health Specialists, Laconia - Psychologist, Psychiatrist, Psychotherapist, etc
- Metal Stampings Manufacturers, Laconia
- Metaphysical Churches, Laconia
- Methodist Church, Laconia
- Mexican Restaurants, Laconia
- Midwives, Laconia
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- Mini Golf Courses, Laconia
- Mirrors, Laconia - Custom, Framed, Bathroom, Vanity & Wall Mirrors
- Miscellaneous Household Item Repair, Laconia
- Miscellaneous Business Services, Laconia
- Miscellaneous Government, Laconia
- Miscellaneous Industry, Laconia
- Miscellaneous Metal Work Manufacturers, Laconia
- Miscellaneous Personal Services, Laconia
- Miscellaneous Photographers, Laconia
- Miscellaneous Professional, Laconia
- Monuments, Tombstones, Markers & Memorials, Laconia
- Mortgage Bankers & Correspondents, Laconia
- Motor Vehicle, Laconia
- Motor Vehicle Rental & Leasing, Laconia
- Motorcycle & Motor Scooters Dealers, Repair & Service, Laconia
- Motorcycle Apparel, Laconia
- Motorcycle Inspection Stations, Laconia
- Motorcycle Parts, Accessories & Dealers, Laconia
- Motorcycle Repair & Service, Laconia
- Movie Theaters, Laconia
- Moving & Storage Supplies & Equipment, Laconia
- Moving Companies, Laconia
- Muffler Shop & Exhaust Systems, Laconia
- Museums, Laconia
- Music, Laconia
- Musical Instruments & Equipment Stores, Laconia
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