| NAICS code | NAICS Text
| SIC code | SIC Text
|
| 111411 | Mushroom Production | 0182 | Food Crops Grown Under Cover (mushrooms, growing of) |
| 21 | Mining | | |
| 212 | Mining (except Oil and Gas) | | |
| 2122 | Metal Ore Mining | | |
| 233220 | Multifamily Housing Construction | 1522 | General Contractors-Residential Building, Other Than Single-Family (except hotel and motel construction) |
| 233220 | Multifamily Housing Construction | 1531 | Operative Builders (multi-family housing construction) |
| 233220 | Multifamily Housing Construction | 8741 | Management Services (multi-family housing construction management) |
| 233310 | Manufacturing and Industrial Building Construction | 1531 | Operative Builders (manufacturing and light industrial building construction) |
| 233310 | Manufacturing and Industrial Building Construction | 1541 | General Contractors-Industrial Buildings and Warehouses (except public warehouse construction) |
| 233310 | Manufacturing and Industrial Building Construction | 8741 | Management Services (manufacturing and industrial building construction management) |
| 2354 | Masonry, Drywall, Insulation, and Tile Contractors | | |
| 235410 | Masonry and Stone Contractors | 1741 | Masonry, Stone Setting and Other Stone Work |
| 311213 | Malt Manufacturing | 2083 | Malt |
| 311612 | Meat Processed from Carcasses | 2013 | Sausages and Other Prepared Meats (except lard made from purchased materials) |
| 311612 | Meat Processed from Carcasses | 5147 | Meat and Meat Products (boxed beef) |
| 311941 | Mayonnaise, Dressing, and Other Prepared Sauce Manufacturing | 2035 | Pickled Fruits and Vegetables, Vegetable Seasonings, and Sauces and Salad Dressings (sauces and salad dre |
| 311941 | Mayonnaise, Dressing, and Other Prepared Sauce Manufacturing | 2099 | Food Preparations, NEC (vinegar, prepared dips (except dairy), and cider) |
| 315211 | Men's and Boys' Cut and Sew Apparel Contractors | 2311 | Men's and Boys' Suits, Coats, and Overcoats (contractors) |
| 315211 | Men's and Boys' Cut and Sew Apparel Contractors | 2321 | Men's and Boys' Shirts, Except Work Shirts (contractors) |
| 315211 | Men's and Boys' Cut and Sew Apparel Contractors | 2322 | Men's and Boys' Underwear and Nightwear (contractors) |
| 315211 | Men's and Boys' Cut and Sew Apparel Contractors | 2323 | Men's and Boys' Neckwear (contractors) |
| 315211 | Men's and Boys' Cut and Sew Apparel Contractors | 2325 | Men's and Boys' Trousers and Slacks (contractors) |
| 315211 | Men's and Boys' Cut and Sew Apparel Contractors | 2326 | Men's and Boys' Work Clothing (contractors) |
| 315211 | Men's and Boys' Cut and Sew Apparel Contractors | 2329 | Men's and Boys' Clothing, NEC (contractors) |
| 315211 | Men's and Boys' Cut and Sew Apparel Contractors | 2341 | Women's, Misses', Children's, and Infants' Underwear and Nightwear (boys' contractors) |
| 315211 | Men's and Boys' Cut and Sew Apparel Contractors | 2353 | Hats, Caps, and Millinery (men's and boys' contractors) |
| 315211 | Men's and Boys' Cut and Sew Apparel Contractors | 2361 | Girls', Children's, and Infants' Dresses, Blouses, and Shirts (boys' contractors) |
| 315211 | Men's and Boys' Cut and Sew Apparel Contractors | 2369 | Girls', Children's, and Infants' Outerwear, NEC (boys' contractors) |
| 315211 | Men's and Boys' Cut and Sew Apparel Contractors | 2371 | Fur Goods (men's and boys' contractors) |
| 315211 | Men's and Boys' Cut and Sew Apparel Contractors | 2381 | Dress and Work Gloves, Except Knit and All-Leather (men's and boys' contractors) |
| 315211 | Men's and Boys' Cut and Sew Apparel Contractors | 2384 | Robes and Dressing Gowns (men's and boys' contractors) |
| 315211 | Men's and Boys' Cut and Sew Apparel Contractors | 2385 | Waterproof Outerwear (men's and boys' contractors) |
| 315211 | Men's and Boys' Cut and Sew Apparel Contractors | 2386 | Leather and Sheep-Lined Clothing ( men's and boys' contractors) |
| 315211 | Men's and Boys' Cut and Sew Apparel Contractors | 2387 | Apparel Belts (men's and boy's contractors) |
| 315211 | Men's and Boys' Cut and Sew Apparel Contractors | 2389 | Apparel and Accessories, NEC (contractors) |
| 315211 | Men's and Boys' Cut and Sew Apparel Contractors | 2395 | Pleating, Decorative and Novelty Stitching, and Tucking for the Trade (men's and boy's apparel contractor |
| 315211 | Men's and Boys' Cut and Sew Apparel Contractors | 3151 | Leather Gloves and Mittens ( men's and boys' contractors) |
| 315220 | Men's and Boys' Cut and Sew Apparel Manufacturing | | |
| 315221 | Men's and Boys' Cut and Sew Underwear and Nightwear Manufacturing | 2322 | Men's and Boys' Underwear and Nightwear (except contractors) |
| 315221 | Men's and Boys' Cut and Sew Underwear and Nightwear Manufacturing | 2341 | Women's, Misses', Children's, and Infants' Underwear and Nightwear (boys' except contractors) |
| 315221 | Men's and Boys' Cut and Sew Underwear and Nightwear Manufacturing | 2369 | Girls', Children's, and Infants' Outerwear, NEC (boys' robes except contractors) |
| 315221 | Men's and Boys' Cut and Sew Underwear and Nightwear Manufacturing | 2384 | Robes and Dressing Gowns (men's except contractors) |
| 315222 | Men's and Boys' Cut and Sew Suit, Coat, and Overcoat Manufacturing | 2311 | Men's and Boys' Suits, Coats, and Overcoats (except contractors) |
| 315222 | Men's and Boys' Cut and Sew Suit, Coat, and Overcoat Manufacturing | 2369 | Girls', Children's, and Infants' Outerwear, NEC (boys' suits and coats except contractors) |
| 315222 | Men's and Boys' Cut and Sew Suit, Coat, and Overcoat Manufacturing | 2385 | Waterproof Outerwear (men's and boys' water resistant or water repellent tailored overcoats, except contr |
| 315222 | Men's and Boys' Cut and Sew Suit, Coat, and Overcoat Manufacturing | 5699 | Miscellaneous Apparel and Accessory Stores (custom tailors) |
| 315223 | Men's and Boys' Cut and Sew Shirt (except Work Shirt) Manufacturing | 2321 | Men's and Boys' Shirts, Except Work Shirts (except contractors) |
| 315223 | Men's and Boys' Cut and Sew Shirt (except Work Shirt) Manufacturing | 2361 | Girls', Children's, and Infants' Dresses, Blouses, and Shirts (boys' shirts except contractors) |
| 315223 | Men's and Boys' Cut and Sew Shirt (except Work Shirt) Manufacturing | 5699 | Miscellaneous Apparel and Accessory Stores (custom tailors) |
| 315224 | Men's and Boys' Cut and Sew Trouser, Slack, and Jean Manufacturing | 2325 | Men's and Boys' Trousers and Slacks (except contractors) |
| 315224 | Men's and Boys' Cut and Sew Trouser, Slack, and Jean Manufacturing | 2369 | Girls', Children's, and Infants' Outerwear, NEC (boys' trousers, slacks, and jeans except contractors) |
| 315225 | Men's and Boys' Cut and Sew Work Clothing Manufacturing | 2326 | Men's and Boys' Work Clothing (except contractors) |
| 315228 | Men's and Boys' Cut and Sew Other Outerwear Manufacturing | 2329 | Men's and Boys' Clothing, NEC (men's and boys' other outerwear except contractors) |
| 315228 | Men's and Boys' Cut and Sew Other Outerwear Manufacturing | 2369 | Girls', Children's, and Infants' Outerwear, NEC (boys' other outerwear except contractors) |
| 315228 | Men's and Boys' Cut and Sew Other Outerwear Manufacturing | 2385 | Waterproof Outerwear (men's and boys' water resistant or water repellent nontailored outerwear, except ru |
| 315993 | Men's and Boys' Neckwear Manufacturing | 2323 | Men's and Boys' Neckwear (except contractors) |
| 316213 | Men's Footwear (except Athletic) Manufacturing | 3143 | Men's Footwear, Except Athletic |
| 31-330 | Manufacturing | | |
| 321910 | Millwork | | |
| 321991 | Manufactured Home (Mobile Home) Manufacturing | 2451 | Mobile Homes |
| 323116 | Manifold Business Forms Printing | 2761 | Manifold Business Forms |
| 323116 | Manifold Business Forms Printing | 2782 | Blankbooks, Loose-leaf Binders and Devices (checkbooks) |
| 325411 | Medicinal and Botanical Manufacturing | 2833 | Medicinal Chemicals and Botanical Products |
| 327993 | Mineral Wool Manufacturing | 3296 | Mineral Wool |
| 332116 | Metal Stamping | 3469 | Metal Stampings, NEC (except kitchen utensils, pots and pans for cooking, and coins) |
| 332321 | Metal Window and Door Manufacturing | 3442 | Metal Doors, Sash, Frames, Molding and Trim |
| 332321 | Metal Window and Door Manufacturing | 3449 | Miscellaneous Structural Metal Work (curtain wall) |
| 332420 | Metal Tank (Heavy Gauge) Manufacturing | 3443 | Fabricated Plate Work (Boiler Shops) (heavy gauge tanks) |
| 332430 | Metal Can, Box, and Other Metal Container (Light Gauge) Manufacturing | | |
| 332431 | Metal Can Manufacturing | 3411 | Metal Cans |
| 3327 | Machine Shops; Turned Product; and Screw, Nut, and Bolt Manufacturing | | |
| 332710 | Machine Shops | 3599 | Industrial and Commercial Machinery and Equipment, NEC (machine shops) |
| 332811 | Metal Heat Treating | 3398 | Metal Heat Treating |
| 332812 | Metal Coating, Engraving (except Jewelry and Silverware), and Allied Services to Manufacturers | 3479 | Coating, Engraving, and Allied Services, NEC (except jewelry, silverware, and flatware engraving and etch |
| 332910 | Metal Valve Manufacturing | | |
| 333 | Machinery Manufacturing | | |
| 333130 | Mining and Oil and Gas Field Machinery Manufacturing | | |
| 333131 | Mining Machinery and Equipment Manufacturing | 3532 | Mining Machinery and Equipment, Except Oil and Gas Field Machinery and Equipment |
| 3335 | Metalworking Machinery Manufacturing | | |
| 333510 | Metalworking Machinery Manufacturing | | |
| 333512 | Machine Tool (Metal Cutting Types) Manufacturing | 3541 | Machine Tools, Metal Cutting Type |
| 333513 | Machine Tool (Metal Forming Types) Manufacturing | 3542 | Machine Tools, Metal Forming Type |
| 333613 | Mechanical Power Transmission Equipment Manufacturing | 3568 | Mechanical Power Transmission Equipment, NEC |
| 333913 | Measuring and Dispensing Pump Manufacturing | 3586 | Measuring and Dispensing Pumps |
| 333920 | Material Handling Equipment Manufacturing | | |
| 3346 | Manufacturing and Reproducing Magnetic and Optical Media | | |
| 334610 | Manufacturing and Reproducing Magnetic and Optical Media | | |
| 334613 | Magnetic and Optical Recording Media Manufacturing | 3695 | Magnetic and Optical Recording Media |
| 334613 | Magnetic and Optical Recording Media Manufacturing | 3577 | Computer Peripheral Equipment, NEC (magnetic tape cleaners) |
| 335220 | Major Appliance Manufacturing | | |
| 335312 | Motor and Generator Manufacturing | 3621 | Motors and Generators |
| 335312 | Motor and Generator Manufacturing | 7694 | Armature Rewinding Shops (remanufacturing) |
| 3361 | Motor Vehicle Manufacturing | | |
| 3362 | Motor Vehicle Body and Trailer Manufacturing | | |
| 336210 | Motor Vehicle Body and Trailer Manufacturing | | |
| 336211 | Motor Vehicle Body Manufacturing | 3711 | Motor Vehicles and Passenger Car Bodies (kit car and other passenger car bodies) |
| 336211 | Motor Vehicle Body Manufacturing | 3713 | Truck and Bus Bodies |
| 336211 | Motor Vehicle Body Manufacturing | 3714 | Motor Vehicle Parts and Accessories (dump truck lifting mechanisms and fifth wheels) |
| 336213 | Motor Home Manufacturing | 3716 | Motor Homes |
| 3363 | Motor Vehicle Parts Manufacturing | | |
| 336310 | Motor Vehicle Gasoline Engine and Engine Parts Manufacturing | | |
| 336320 | Motor Vehicle Electrical and Electronic Equipment Manufacturing | | |
| 336330 | Motor Vehicle Steering and Suspension Components (except Spring) Manufacturing | 3714 | Motor Vehicle Parts and Accessories (steering and suspension parts) |
| 336340 | Motor Vehicle Brake System Manufacturing | 3292 | Asbestos Products (asbestos brake linings and pads) |
| 336340 | Motor Vehicle Brake System Manufacturing | 3714 | Motor Vehicle Parts and Accessories (brake and brake systems, including assemblies) |
| 336350 | Motor Vehicle Transmission and Power Train Parts Manufacturing | 3714 | Motor Vehicle Parts and Accessories (transmissions and power train parts, including rebuilding) |
| 336360 | Motor Vehicle Seating and Interior Trim Manufacturing | 2396 | Automotive Trimmings, Apparel Findings, and Related Products (textile motor vehicle trimming) |
| 336360 | Motor Vehicle Seating and Interior Trim Manufacturing | 2399 | Fabricated Textile Products, NEC (seat belts, and seat and tire covers) |
| 336360 | Motor Vehicle Seating and Interior Trim Manufacturing | 2531 | Public Building and Related Furniture (seats for motor vehicles) |
| 336360 | Motor Vehicle Seating and Interior Trim Manufacturing | 3499 | Fabricated Metal Products, NEC (metal motor vehicle seat frames) |
| 336370 | Motor Vehicle Metal Stamping | 3465 | Automotive Stampings |
| 336391 | Motor Vehicle Air-Conditioning Manufacturing | 3585 | Air-Conditioning and Warm Air Heating Equipment and Commercial and Industrial Refrigeration Equipment (mo |
| 336991 | Motorcycle, Bicycle, and Parts Manufacturing | 3944 | Games, Toys, and Children's Vehicles, Except Dolls and Bicycles (metal tricycles) |
| 336991 | Motorcycle, Bicycle, and Parts Manufacturing | 3751 | Motorcycles, Bicycles and Parts |
| 336992 | Military Armored Vehicle, Tank, and Tank Component Manufacturing | 3711 | Motor Vehicles and Passenger Car Bodies (military armored vehicles) |
| 336992 | Military Armored Vehicle, Tank, and Tank Component Manufacturing | 3795 | Tanks and Tank Components |
| 337124 | Metal Household Furniture Manufacturing | 2514 | Metal Household Furniture (except upholstered and metal box spring frames) |
| 337910 | Mattress Manufacturing | 2515 | Mattresses, Foundations and Convertible Beds (mattresses and foundations) |
| 339 | Miscellaneous Manufacturing | | |
| 3391 | Medical Equipment and Supplies Manufacturing | | |
| 339110 | Medical Equipment and Supplies Manufacturing | | |
| 339943 | Marking Device Manufacturing | 3953 | Marking Devices |
| 339992 | Musical Instrument Manufacturing | 3931 | Musical Instruments |
| 4211 | Motor Vehicle and Motor Vehicle Parts and Supplies Wholesalers | | |
| 421120 | Motor Vehicle Supplies and New Parts Wholesalers | 5013 | Motor Vehicle Supplies and New Parts (except parts sold via retail methods) |
| 421140 | Motor Vehicle Parts (Used) Wholesalers | 5015 | Motor Vehicle Parts, Used (except sold via retail method) |
| 421450 | Medical, Dental, and Hospital Equipment and Supplies Wholesalers | 5047 | Medical, Dental and Hospital Equipment and Supplies (except medical, dental, and hospital equipment and s |
| 4215 | Metal and Mineral (except Petroleum) Wholesalers | | |
| 421510 | Metal Service Centers and Offices | 5051 | Metals Service Centers and Offices |
| 4218 | Machinery, Equipment, and Supplies Wholesalers | | |
| 4219 | Miscellaneous Durable Goods Wholesalers | | |
| 422320 | Men's and Boys' Clothing and Furnishings Wholesalers | 5136 | Men's and Boys' Clothing and Furnishings |
| 422470 | Meat and Meat Product Wholesalers | 5147 | Meats and Meat Products (except boxed beef) |
| 4229 | Miscellaneous Nondurable Goods Wholesalers | | |
| 441 | Motor Vehicle and Parts Dealers | | |
| 441220 | Motorcycle, Boat, and Other Motor Vehicle Dealers | | |
| 441221 | Motorcycle Dealers | 5571 | Motorcycle Dealers |
| 445210 | Meat Markets | 5421 | Meat and Fish (Seafood) Markets, Including Freezer Provisioners (meat except freezer provisioners) |
| 445210 | Meat Markets | 5499 | Miscellaneous Food Stores (poultry and poultry products) |
| 448110 | Men's Clothing Stores | 5611 | Men's and Boys' Clothing and Accessory Stores (clothing stores) |
| 451140 | Musical Instrument and Supplies Stores | 5736 | Musical Instruments Stores |
| 453 | Miscellaneous Store Retailers | | |
| 453930 | Manufactured (Mobile) Home Dealers | 5271 | Mobile Home Dealers |
| 485111 | Mixed Mode Transit Systems | 4111 | Local and Suburban Transit (mixed mode) |
| 488320 | Marine Cargo Handling | 4491 | Marine Cargo Handling (all but dock and pier operations) |
| 488410 | Motor Vehicle Towing | 7549 | Automotive Services, Except Repair and Carwashes (towing) |
| 512 | Motion Picture and Sound Recording Industries | | |
| 5121 | Motion Picture and Video Industries | | |
| 512110 | Motion Picture and Video Production | 7812 | Motion Picture and Video Tape Production |
| 512120 | Motion Picture and Video Distribution | 7822 | Motion Picture and Video Tape Distribution (except video tape and cassette wholesalers) |
| 512120 | Motion Picture and Video Distribution | 7829 | Services Allied to Motion Picture Distribution (commercial distribution film libraries) |
| 512130 | Motion Picture and Video Exhibition | | |
| 512131 | Motion Picture Theaters (except Drive-Ins) | 7832 | Motion Picture Theaters, Except Drive-In |
| 512230 | Music Publishers | 2731 | Books: Publishing, or Publishing and Printing (music books) |
| 512230 | Music Publishers | 2741 | Miscellaneous Publishing (sheet music publishing) |
| 512230 | Music Publishers | 8999 | Services, NEC (music publishing) |
| 521 | Monetary Authorities - Central Bank | | |
| 5211 | Monetary Authorities - Central Bank | | |
| 521110 | Monetary Authorities - Central Bank | 6011 | Federal Reserve Banks |
| 522310 | Mortgage and Nonmortgage Loan Brokers | 6163 | Loan Brokers |
| 523910 | Miscellaneous Intermediation | 6211 | Security Brokers, Dealers, and Flotation Companies (except security and commodity dealers, security broke |
| 523910 | Miscellaneous Intermediation | 6153 | Short-Term Business Credit Institutions, Except Agricultural (except credit card service and issuing and |
| 523910 | Miscellaneous Intermediation | 6792 | Oil Royalty Traders (investing on own account) |
| 523910 | Miscellaneous Intermediation | 6799 | Investors, NEC (venture capital companies, investment clubs, and speculators for own account) |
| 523999 | Miscellaneous Financial Investment Activities | 6211 | Security Brokers, Dealers, and Flotation Companies (oil and gas lease brokers' officers) |
| 523999 | Miscellaneous Financial Investment Activities | 6289 | Services Allied With the Exchange of Securities or Commodities, NEC (except securities custodians) |
| 5416 | Management, Scientific, and Technical Consulting Services | | |
| 541610 | Management Consulting Services | | |
| 541613 | Marketing Consulting Services | 8742 | Management Consulting Services (marketing consulting) |
| 541830 | Media Buying Agencies | 7319 | Advertising, NEC (media buying services) |
| 541840 | Media Representatives | 7313 | Radio, Television, and Publishers' Advertising Representatives |
| 541910 | Marketing Research and Public Opinion Polling | 8732 | Commercial Economic, Sociological, and Educational Research (market research and opinion research) |
| 55 | Management of Companies and Enterprises | | |
| 551 | Management of Companies and Enterprises | | |
| 5511 | Management of Companies and Enterprises | | |
| 551110 | Management of Companies and Enterprises | | |
| 562920 | Materials Recovery Facilities | 4953 | Refuse Systems (materials recovery facilities) |
| 6215 | Medical and Diagnostic Laboratories | | |
| 621510 | Medical and Diagnostic Laboratories | | |
| 621511 | Medical Laboratories | 8071 | Medical Laboratories (except diagnostic imaging centers) |
| 711130 | Musical Groups and Artists | 7929 | Bands, Orchestras, Actors, and Entertainment Groups (musical groups and artists and orchestras) |
| 712 | Museums, Historical Sites, and Similar Institutions | | |
| 7121 | Museums, Historical Sites, and Similar Institutions | | |
| 712110 | Museums | 8412 | Museums and Art Galleries (except historic and heritage sites) |
| 713930 | Marinas | 4493 | Marinas |
| 722330 | Mobile Food Services | 5963 | Direct Selling Establishments (mobile food wagons) |