Machine Shops
Machine Tool (Metal Cutting Types) Manufacturing
Machine Tool (Metal Forming Types) Manufacturing
Macrame
Magicians, Independent
Magnetic and Optical Recording Media Manufacturing
Mail-Order Houses
Mailing List Publishers
Malt Manufacturing
Management Consulting Services
Management Development Training
Manifold Business Forms Printing
Manufactured (Mobile) Home Dealers
Manufactured Home (Mobile Home) Manufacturing
Map Publishers (except Exclusive Internet Publishing)
Marinas
Marine Cargo Handling
Marketing Consulting Services
Marketing Research
Marking Device Manufacturing
Masonry Contractors
Materials Recovery Facilities
Mattress Manufacturing
Mayonnaise, Dressing, and Other Prepared Sauce Manufacturing
Measuring and Dispensing Pump Manufacturing
Meat and Meat Product Merchant Wholesalers
Meat Byproduct Processing and Rendering
Meat Markets
Meat Processed from Carcasses
Mechanical Power Transmission Equipment Manufacturing
Media Buying Agencies
Media Representatives
Medical Claims Billing Service
Medical, Dental, and Hospital Equipment and Supplies Merchant Wholesalers
Medical Hospitals
Medical Laboratories
Medical Office Management Consulting Services or Consultants
Medicinal and Botanical Manufacturing
Melon Farming
Menageries
Men's and Boys' Clothing and Furnishings Merchant Wholesalers
Men's and Boys' Cut and Sew Apparel Contractors
Men's and Boys' Cut and Sew Other Outerwear Manufacturing
Men's and Boys' Cut and Sew Shirt (except Work Shirt) Manufacturing
Men's and Boys' Cut and Sew Suit, Coat, and Overcoat Manufacturing
Men's and Boys' Cut and Sew Trouser, Slack, and Jean Manufacturing
Men's and Boys' Cut and Sew Underwear and Nightwear Manufacturing
Men's and Boys' Cut and Sew Work Clothing Manufacturing
Men's and Boys' Neckwear Manufacturing
Men's Clothing Stores
Men's Footwear (except Athletic) Manufacturing
Mental Health Practitioners Offices (except Physicians)
Metal Can Manufacturing
Metal Coating, Engraving (except Jewelry and Silverware), and Allied Services to Manufacturers
Metal Heat Treating
Metal Household Furniture Manufacturing
Metal Service Centers and Other Metal Merchant Wholesalers
Metal Stamping
Metal Tank (Heavy Gauge) Manufacturing
Metal Window and Door Manufacturing
Metalworking
Military Armored Vehicle, Tank, and Tank Component Manufacturing
Milk Production
Millwork (including Flooring)
Mineral Wool Manufacturing
Miniature Golf Courses
Mining Machinery and Equipment Manufacturing
Mining Machinery and Equipment Rental and Leasing
Miniwarehouses and Self-Storage Units Lessors
Mixed Mode Transit Systems
Mobile Food Services
Models, Independent
Mortgage and Nonmortgage Loan Brokers
Mosquito Eradication Services
Motels
Motion Picture and Video Distribution
Motion Picture and Video Production
Motion Picture Directors, Independent
Motion Picture Producers, Independent
Motion Picture Theaters (except Drive-Ins)
Motivational Speakers, Independent
Motor and Generator Manufacturing
Motor Home Manufacturing
Motor Vehicle Air Conditioning Manufacturing
Motor Vehicle Body Manufacturing
Motor Vehicle Brake System Manufacturing
Motor Vehicle Metal Stamping
Motor Vehicle Parts (Used) Merchant Wholesalers
Motor Vehicle Seating and Interior Trim Manufacturing
Motor Vehicle Steering and Suspension Components (except Spring) Manufacturing
Motor Vehicle Supplies and New Parts Merchant Wholesalers
Motor Vehicle Towing
Motor Vehicle Transmission and Power Train Parts Manufacturing
Motorcycle, Bicycle, and Parts Manufacturing
Motorcycle Dealers
Motorcycle Racing Teams
Motorcycle Repair and Maintenance Services
Mountain Hiking, Recreational
Museums
Mushroom Production
Music Arrangers, Independent
Music Directors, Independent
Music Publishers
Musical Groups and Artists
Musical Instrument and Supplies Stores
Musical Instrument Manufacturing
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