- Machine Shop, Falls Church
- Machine Shop & Tool Repair Service, Falls Church
- Machinery, Supplies & Equipment - Business Production Related, Falls Church
- Machinery, Supplies & Equipment - Business Supplies Related, Falls Church
- Machinery, Supplies & Equipment - Construction & Contractor Related, Falls Church
- Magazine & Newspaper Stands, Falls Church - Dealers & Distributors
- Magicians & Hypnotist Entertainers, Falls Church
- Mailbox Rental Services, Falls Church
- Mailing, Delivery & Courier Service, Falls Church
- Maintenance, Cleaning & Sanitation, Falls Church
- Major Appliances, Falls Church - Household & Kitchen
- Malls & Shopping Centers, Falls Church
- Management Consultants & Services, Falls Church
- Manicurists & Pedicurists, Falls Church
- Manufacturers Agents & Representatives, Falls Church
- Manufacturers Representative, Falls Church - Reps, Independent Sales Representative, Sales Agent, etc
- Manufacturing, Falls Church
- Manufacturing Equipment & Supplies, Falls Church
- Manufacturing Products, Falls Church
- Marine Contractors & Designers, Falls Church
- Marine Electronic Equipment, Falls Church
- Marine Products And Services, Falls Church
- Marine Repair & Service Stations, Falls Church
- Marine Supplies & Equipment Repair, Falls Church - Boat Supplies & Equipment
- Market Research & Analysis , Falls Church - Market Analysis, Business & Economic Research
- Marketing Consultants Professional Practices, Falls Church
- Marriage & Family Counselors, Falls Church
- Martial Arts & Self Defense Schools, Falls Church
- Masonry Contractors, Falls Church - Stone Mason, Brick Mason - Install & Repair
- Masonry Materials & Supplies, Falls Church
- Massage Therapists & Professional, Falls Church
- Massage Therapy, Falls Church
- Material Handling & Heavy Machinery & Equipment, Falls Church
- Meat Market, Wholesale & Products, Falls Church
- Mechanical Engineer, Falls Church - Mechanical Engineering Service
- Medical & Dental Assistant Schools, Falls Church
- Medical & Dental Management, Falls Church
- Medical Billing Services, Falls Church
- Medical Diagnostic Clinics, Falls Church - Clinical Labs & Centers
- Medical Equipment Manufacturers, Falls Church
- Medical Groups & Clinics, Falls Church - Medical & Health Centers
- Medical Management & Business Administration Service, Falls Church
- Medical Records Service , Falls Church
- Medical Research, Falls Church
- Medical Research & Development, Falls Church - Medical Information & Research
- Medical Research Facilities, Falls Church - Research & Development Centers
- Medical Supplies & Equipment, Falls Church
- Medical Transcription Service, Falls Church
- Meeting & Event Planning Services, Falls Church - Conference Consultants
- Membership Sports & Recreation Clubs, Falls Church
- Men's & Boys Clothing & Accessories Stores, Falls Church
- Men's Clothing Stores, Falls Church - Clothes & Accessories
- Mental & Developmental Information & Referral Services, Falls Church
- Mental Health Specialists, Falls Church - Psychologist, Psychiatrist, Psychotherapist, etc
- Merchandise Sales Events, Falls Church
- Metal Powder Products, Falls Church
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- Metal Repair Service & Blacksmith, Falls Church - Iron Works
- Metaphysical Churches, Falls Church
- Methodist Church, Falls Church
- Metropolitan Church, Falls Church
- Mexican Restaurants, Falls Church
- Microwave Ovens, Falls Church
- Midwives, Falls Church
- Mini & Self Storage, Falls Church
- Mini Golf Courses, Falls Church
- Mirrors, Falls Church - Custom, Framed, Bathroom, Vanity & Wall Mirrors
- Miscellaneous Business Product Repair, Falls Church
- Miscellaneous Household Item Repair, Falls Church
- Miscellaneous Business Services, Falls Church
- Miscellaneous Commercial & Industrial Supplies & Equipment Rental & Leasing, Falls Church
- Miscellaneous Government, Falls Church
- Miscellaneous Manufacturing, Falls Church
- Miscellaneous Personal Services, Falls Church
- Miscellaneous Photographers, Falls Church
- Miscellaneous Professional, Falls Church
- Moisture & Vapor Control, Falls Church
- Money Counting & Wrapping, Falls Church
- Money Transfer Service, Falls Church
- Monuments, Tombstones, Markers & Memorials, Falls Church
- Mortgage Bankers & Correspondents, Falls Church
- Mortgage Brokers, Falls Church
- Mortgage Companies, Falls Church
- Mortgage Contracts & Services, Falls Church
- Mortgages & Loans, Falls Church
- Mosques, Falls Church
- Motion Picture & Television Production Services, Falls Church
- Motion Picture Pre & Post Production Services, Falls Church
- Motion Pictures Video Tape Duplication & Transfer Services, Falls Church
- Motor Vehicle, Falls Church
- Motor Vehicle Rental & Leasing, Falls Church
- Motorcycle & Motor Scooters Dealers, Repair & Service, Falls Church
- Motorcycle Parts, Accessories & Dealers, Falls Church
- Motorcycle Repair & Service, Falls Church
- Mountain & Rock Climbing Equipment, Falls Church
- Movie Theaters, Falls Church
- Moving & Storage Consultants, Falls Church
- Moving & Storage Supplies & Equipment, Falls Church
- Moving Companies, Falls Church
- Moving Supplies & Equipment Rental, Falls Church
- Moving Truck Rental , Falls Church
- Muffler Shop & Exhaust Systems, Falls Church
- Multimedia Publishers, Falls Church - Multimedia Services & Systems
- Music, Falls Church
- Music Entertainment, Falls Church
- Music Lessons, Falls Church
- Music Lessons - Instrumental, Falls Church
- Music Sheet, Falls Church
- Music Stores Retail, Falls Church
- Musical Instrument Rental, Falls Church - Band & Orchestra Instruments
- Musical Instruments & Equipment Stores, Falls Church
- Musical Instruments - Violins, Falls Church
- Musical Instruments Repair, Sales & Service, Falls Church
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