| Sabotage Prevention Service (6) | Sachets (1) |
| Saddlery & Harness Manufacturers (14) | Saddlery & Harness Wholesale (11) |
| Safe Deposit Box Rentals (777) | Safe Deposit Box Services (771) |
| Safes & Vaults (657) | Safes & Vaults Movers (307) |
| Safes & Vaults Opening & Repair (1646) | Safes & Vaults Used (63) |
| Safety & Security Services (1315) | Safety & Security Systems Installation & Service (1338) |
| Safety Cans (29) | Safety Equipment & Clothing Manufacturers (164) |
| Safety Equipment & Supplies (1696) | Sailboats & Yachts (1521) |
| Sailing Instructions (245) | Sailmakers & Sail Repair (418) |
| Saimin Retail (4) | Salads Wholesale (30) |
| Salads Wholesale & Manufacturers (31) | Sales & Order Books (79) |
| Sales Consultants (111) | Sales Organizations (655) |
| Sales Promotion & Counseling (550) | Sales Promotion Services (1319) |
| Salt (1802) | Salt Mining (1) |
| Salvage-Yards (Wholesale) (1331) | Sample Cases Cards & Books (165) |
| Sample Cases-Wholesale & Manufacturers (149) | Sand & Gravel (Wholesale) (429) |
| Sand & Gravel Handling Equipment (73) | Sand & Gravel Transportation (99) |
| Sand & Gravel-Manufacturers (19080) | Sandblasting (5340) |
| Sandblasting Equipment & Supplies (745) | Sandblasting Equipment & Supplies Manufacturers (3) |
| Sandblasting Equipment & Supplies Rental (21) | Sandwiches Manufacturers (22) |
| Sandwiches-Wholesale (4) | Sanitariums (161) |
| Sanitary Food Containers, Except Folding (8) | Sanitary Paper Products (18) |
| Sanitary Products Supplies & Services (Wholesale) (22) | Sanitary Services (20670) |
| Sanitation Consultants (390) | Sanitation Services (1012) |
| Sash Operating Devices (7) | Sash-Wood-Manufacturers (1) |
| Satellite Communication Services (1778) | Satellite Descrambling & Programming Service (18) |
| Satellite Dishes Television (2926) | Satellite Downlinking (4) |
| Satellite Equipment (82) | Satellite Equipment & System Repair (2945) |
| Satellite Equipment & Systems Manufacturers (52) | Satellite Equipment & Systems-Retail (15635) |
| Satellite Television Equipment & Systems (11139) | Sauerkraut (4) |
| Sauna Equipment & Supplies (1022) | Sauna Equipment & Supplies Manufacturers (10) |
| Sauna Equipment & Supplies Wholesale (10) | Sausage (793) |
| Sausage Casings (Manufacturers) (49) | Sausage Manufacturers (10) |
| Sausage Retail (211) | Sausages & other prepared meats (43) |
| Savings & Loan Associations Representatives (48) | Savings & Loans (7112) |
| Savings Institutions, Not Federally Chartered (11) | Savings Plans (245) |
| Saw Mills Equipment & Supplies (225) | Saw Rental (27) |
| Saw Timber Pulpwood (1) | Sawdust & Shavings (339) |
| Sawmills & Planing Mills, General (4192) | Saws (8250) |
| Saws & Sawing Equipment (22) | Saws Commercial & Industrial (52) |
| Scaffolding & Aerial Lifts (2333) | Scale Repair (766) |
| Scales (2617) | Scales & Balances Manufacturers Exc. Laboratory (23) |
| Scales Public (308) | Scales Used (27) |
| Scales-Renting (173) | Scallop Cutting (7) |
| Scalp Treatment (395) | Scarves Wearing Apparel (25) |
| Scenery Studios (174) | School Buses (565) |
| School Districts (40762) | School Furniture & Equipment (426) |
| School Furniture & Equipment Retail (20) | School Information, Placement & Scholarship Bureau (1968) |
| School Psychologists (2) | School Supplies & Equipment Retail (2845) |
| School Supplies Manufacturers (234) | School Supplies Wholesale (194) |
| Schools (764375) | Schools & Educational Services Misc. (69674) |
| Schools & Educational Services, Drama (1086) | Schools & Educational Services, Etiquette & Modeling (591) |
| Schools & Educational Services, Fashion & Design (163) | Schools & Educational Services, Health Related (2570) |
| Schools & Educational Services, Language (2319) | Schools & Educational Services, Personal Development (1230) |
| Schools & General Instruction Educational Assessment (74) | Schools Academic Career Coordination (3) |
| Schools Correspondence (57) | Schools Court Reporting (183) |
| Schools CPR Training (126) | Schools Doll Making (118) |
| Schools Exams & Tests Preparation (584) | Schools Fashion (12) |
| Schools First Aid & Safety Instruction (1508) | Schools For The Blind (39) |
| Schools For The Deaf (154) | Schools High & Preparatory (24166) |
| Schools Insurance (69) | Schools Interior Decorating & Designing (29) |
| Schools Kindergartens (56) | Schools Management Development (6) |
| Schools Massage Therapy (1045) | Schools Medical & Dental Assistants (1234) |
| Schools Medical Secretarial (29) | Schools Modeling & Charm (558) |
| Schools Montessori (56) | Schools Natural Health & Education (92) |
| Schools Nurses (825) | Schools Pharmacology (20) |
| Schools Physical Therapy (13) | Schools Pottery Instruction (35) |
| Schools Public Speaking (459) | Schools Radiology (4) |
| Schools Real Estate Sales (2321) | Schools Safety Consultants & Training (122) |
| Schools Sewing (804) | Schools Speech Correction (22) |
| Schools Tailoring (10) | Schools Theatrical (187) |
| Schools Time Management Training (15) | Schools Travel Agents (53) |
| Schools With Special Academic Education (14769) | Schools, Electrical & Electronic (47) |
| Schools, Elementary & Secondary, Specialty Education (15628) | Schools, Vocational, Business (16508) |
| Schools-Accounting & Bookkeeping (50) | Schools-Adult Education (2066) |
| Schools-Business & Secretarial (7090) | Schools-Business & Vocational (34192) |
| Schools-Elementary (391) | Schools-Junior High (82585) |
| Schools-Meditation (33) | Schools-Motivation & Self Improvement (1532) |
| Schools-Nursery & Kindergarten (5376) | Schools-Performing Arts (999) |
| Schools-Preschools (53401) | Schools-Private & Parochial (17593) |
| Schools-Public (82680) | Schools-Sales Training (1048) |
| Schools-Senior High (23739) | Schools-Telemarketing Training (7) |
| Schools-Universities & Colleges (186267) | Schools-Universities & Colleges - 2 Year (76) |
| Schools-Universities & Colleges - 4 Year (63) | Schools-Universities-Private & Parochial (37) |
| Schools-Vocational & Technical (418) | Schools-Vocational & Trade (8761) |
| Science Of Mind Practitioners (1) | Scientific Apparatus & Instruments Repair (44) |
| Scientific Instrument Designers (20) | Scientific Instruments (8) |
| Scientists (1315) | Scientologists (8) |
| Scissors & Shears (88) | Scoreboards (120) |
| Scottish & Irish Goods (98) | Scouting Supplies & Uniforms (56) |
| Scrap & Waste Materials (16622) | Scrap Film (110) |
| Scrap Metal Processing & Recycling (2) | Scrap Metals (6010) |
| Scrap Metals Manufacturers (39) | Scrap Rubber (28) |
| Scrapbooks & Scrapbook Supplies (2601) | Screen Door & Window Repair (8842) |
| Screen Door & Window-Wholesale (6799) | Screen Enclosures (7542) |
| Screen Manufacturers Equipment & Supplies (87) | Screen Printing (19764) |
| Screen Printing Equipment & Supplies (481) | Screen Wholesale (45) |
| Screening & Sifting Equipment & Services (132) | Screens Decorative (30) |
| Screens Doors & Windows (4758) | Screens Doors & Windows Manufacturers (13) |
| Screens Manufacturers (195) | Screw Machine Products (1773) |
| Screw Machines & Supplies (111) | Screws (609) |
| Screws Manufacturers (80) | Screws Wholesale (48) |
| Scrimshaw (9) | Script Preparation Service (6) |
| Scuba Diving Equipment Manufacturers (22) | Sculptors (1531) |
| Sculpture Equipment & Supplies (955) | Sculptures Metal (3) |
| Sea Walls Contractors (31) | Seafood Packers, Fresh or Frozen (28) |
| Seafood-Retail (19416) | Seals & Gaskets (1434) |
| Seals Hermetic Manufacturers (24) | Seals Notary & Corporation (581) |
| Seals O Ring (483) | Seals O Ring Manufacturers (7) |
| Seals-Oil, Grease, Etc (Manufacturers) (30) | Seals-Security (Manufacturers) (78) |
| Search & Navigation Equipment (690) | Searchers Of Records (344) |
| Searchlight Rental (1) | Searchlights & Floodlights (250) |
| Seasonal & Holiday Merchandise Stores & Products (4006) | Seasonings & Spices (1161) |
| Seat Belts (33) | Seating Companies (178) |
| Secondary Smelting & Refining Of Nonferrous Metals (79) | Secretarial Services (6058) |
| Securities (1035) | Security & Commodity Exchanges (662) |
| Security Brokers, Dealers, & Flotation Companies (66968) | Security Consultants (2537) |
| Security Control Equipment Systems Manufacturers (403) | Security Equipment & Systems (35734) |
| Security Guard & Patrol Service (10971) | Security Supplies Surveillance Equipment (327) |
| Security Systems & Communications & Computer (422) | Seed & Grain Cleaning (707) |
| Seed & Grain Cleaning Equipment (39) | Seed Coating (6) |
| Seed Companies (241) | Seeding & Sodding Services (6221) |
| Seeds & Bulbs (4228) | Seeds Chinese Preserved (27) |
| Seismic Data Brokers (22) | Seismograph Equipment & Supplies (4) |
| Seismograph Service (126) | Self Defense Weapons (31) |
| Self Esteem Programs (5) | Self Help Groups (56) |
| Semiconductor Manufacturers-Equipment & Supplies (763) | Semiconductors (119) |
| Senior Citizens Counseling (848) | Senior Citizens Housing (1062) |
| Senior Citizens Information & Services (12366) | Senior Citizens Service & Health Organizations (18076) |
| Sensors (15) | Septic Tank Equipment & Supplies (238) |
| Septic Tanks & Systems (29102) | Septic Tanks & Systems Wholesale (14393) |
| Septic Tanks Consultants (900) | Septic Tanks Manufacturers (1454) |
| Septic Tanks/Systems-Cleaning/Repairing (20695) | Sequins (4) |
| Serums & Vaccines (2) | Servers & Switches (29) |
| Service Establishment Equipment (3152) | Service Industry Machinery (1078) |
| Service Station Builders (65) | Service Station Equipment (Manufacturers) (1) |
| Service Station Equipment Repair & Service (324) | Service Station Supplies (Wholesale) (2189) |
| Services Allied To Motion Picture Distribution (8442) | Services Allied To Motion Picture Production (8068) |
| Services Allied With The Exchange Of Securities Or Commodities (2066) | Services Miscellaneous (98099) |
| Servomechanism Systems & Equipment (1) | Settlement Companies (18) |
| Sewage & Water Treatment Equipment (195) | Sewage Disposal Systems Wholesale (3) |
| Sewage Treatment Equipment Manufacturers (8) | Sewage Treatment Plant Contractors (14) |
| Sewer & Drain Cleaning (31929) | Sewer & Drain Cleaning Equipment Rental (60) |
| Sewer Builders & Cleaning Equipment & Supplies (1083) | Sewer Cleaning Equipment & Supplies Manufacturers (13) |
| Sewer Contractors (10173) | Sewer Line Inspection & Maintenance (404) |
| Sewer Thawing (1) | Sewerage Companies Utility (324) |
| Sewerage Systems (2334) | Sewerage Treatment Consultants (35) |
| Sewing Cabinets (8) | Sewing Contractors (3238) |
| Sewing Kits & Cases (9) | Sewing Machine Rental (7) |
| Sewing Machine Repair (4543) | Sewing Machines & Supplies (5747) |
| Sewing Machines Wholesale (193) | Sewing Machines-Manufacturers (5699) |
| Sewing Shops (321) | Sexual Counseling & Therapy (129) |
| Shackles (5) | Shafting (12) |
| Sharpening Equipment & Stones (46) | Sharpening Services (4773) |
| Shavers Electric Repair (570) | Shears Manufacturers (1) |
| Sheaves (4) | Sheds & Buildings-Storage (2466) |
| Sheep & goats (5) | Sheep Shearing (1) |
| Sheepskin Specialties (208) | Sheepskins (1) |
| Sheet Metal & Duct Work (11685) | Sheet Metal Contractors (11536) |
| Sheet Metal Fabricators (907) | Sheet Metal Work Equipment & Supplies (339) |
| Sheet Metalwork Manufacturers (2613) | Shellac Manufacturers (7) |
| Shells Decorative (20) | Shells Marine (185) |
| Shells Marine Manufacturers (3) | Sheltered Care Homes (112) |
| Sheltered Workshops (2) | Shelving (2249) |
| Shelving & Rack Installation (3) | Shelving Wholesale (374) |
| Sheriff (8684) | Shiatsu Therapy (4) |
| Shielding Magnetic Electrostatic Etc (27) | Shims (34) |
| Shingle & Shingle Mills (20) | Shingles (426) |
| Shingles & Shakes Wholesale (18) | Ship & Yacht Agents & Brokers (354) |
| Ship building & repairing (647) | Ship Building Equipment & Supplies (2) |
| Ship Chandlers (203) | Ship Cleaning (20) |
| Ship Fueling (5) | Ship Joiners (11) |
| Ship Management (61) | Ship Mooring Line Service (7) |
| Ship Owners & Operators (442) | Ship Registries (8) |
| Ship Wreckers (2) | Shippers Cooperative Organizations (7) |
| Shipping Agents (389) | Shipping Consultants (221) |
| Shipping Masters (119) | Shipping Package & Parcel (2456) |
| Shipping Service Supplies (Wholesale) (27) | Shipyards (30) |
| Shirts (12348) | Shirts & Necktie Repair (6) |
| Shirts Custom Made (786) | Shirts Custom Printed (221) |
| Shirts Wholesale & Retail (13) | Shirts-Manufacturers (111) |
| Shock Absorbers (2383) | Shock Absorbers & Struts (2378) |
| Shoe & Boot Repairing (7425) | Shoe Dyeing (1689) |
| Shoe Fabrics (9) | Shoe Findings & Supplies (147) |
| Shoe Laces & Supplies (29) | Shoe Machinery (11) |
| Shoe Manufacturers (1507) | Shoe Ornaments (3) |
| Shoe Patterns (1) | Shoe Repairing Equipment & Supplies (83) |
| Shoe Shining (346) | Shoe Shining Equipment & Supplies (31) |
| Shoe Store Supplies (36) | Shoe Stores (38632) |
| Shoe Trees (4) | Shoes & Boots Custom Made (565) |
| Shoes Safety (43) | Shoes Used (5) |
| Shooks (Manufacturers) (1) | Shoplifting Prevention Devices (45) |
| Shoppers Information Service (47) | Shopping Center Consultants (5) |
| Shopping Center Developers (103) | Shopping Centers & Malls (12515) |
| Shopping Service (489) | Shopping Service Protection Price Comparison Etc (96) |
| Shoring Contractors (376) | Shortening (18) |
| Shot Peening (71) | Shoulder Pads (24) |
| Shovels-Power (Manufacturers) (1) | Show Cards (3) |
| Show Cases Manufacturers (1) | Shower Curtains Wholesale (15) |
| Shower Curtains Wholesale & Manufacturers (19) | Shower Doors & Enclosures (5865) |
| Shower Doors & Enclosures Manufacturers (21) | Shower Doors & Enclosures Wholesale (5) |
| Showers Portable (2) | Showroom Equipment & Supplies (11) |
| Shrimp (98) | Shrimp Aquaculture (2) |
| Shrimp Packers, Fresh or Frozen (17) | Shrimp Wholesale (41) |
| Shuffleboards & Accessories (46) | Shutters (6339) |
| Shutters Manufacturers (151) | Shutters Wholesale (124) |
| Shuttle Service (535) | Sidewalk Contractors (320) |
| Sidewalk Doors & Lights (3) | Siding Contractors (30672) |
| Siding Materials (3230) | Siding Materials & Equipment (630) |
| Siding Materials Manufacturers (320) | Sign Hanging & Maintenance Services (1908) |
| Sign Painting (265) | Signal Equipment & Systems (918) |
| Signal Systems (77) | Signs (39728) |
| Signs (Manufacturers) (39966) | Signs Machines & Supplies (259) |
| Silencers Industrial (48) | Silica (22) |
| Silicones & Silicone Products (163) | Silk Screen Printing (383) |
| Silk Warpers (Manufacturers) (9) | Silks Manufacturers (98) |
| Silks Wholesale (100) | Silos & Equipment & Supplies (166) |
| Silver Ores (1) | Silver Recovery (26) |
| Silversmiths & Goldsmiths (369) | Silverware (425) |
| Silverware & Tableware Rental (9) | Silverware Cleaning Repairing & Replating (175) |
| Silverware Used (23) | Silverware-Manufacturers (810) |
| Silverware-Wholesale (873) | Simulators (13) |
| Singing Telegrams (834) | Single-Family Home Designing & Planning Services (1050) |
| Singles Organizations (175) | Sinks & Sink Tops (38) |
| Sirens & Horns (22) | Sisal (1) |
| Site Development Contractors (270) | Site Planners (36) |
| Sitting Services (1385) | Skateboard Parks & Rinks (333) |
| Skateboards & Equipment Wholesale (34) | Skateboards & Equipment-Manufacturers (5) |
| Skateboards & Inline Skates (2588) | Skates, Skateboards & Rollerblades (3635) |
| Skating Apparel (21) | Skating Equipment & Supplies Wholesale (21) |
| Skating Instruction (318) | Skating Rinks (4237) |
| Skating Rinks Installation Equipment & Supplies (14) | Skating Rinks-Equipment & Supplies (1) |
| Ski & Snow Reports (106) | Ski & Snowboard Instructions (297) |
| Ski Apparel Equipment & Supplies (394) | Ski Centers & Resorts (1996) |
| Ski Club (150) | Ski Equipment & Supplies (3235) |
| Ski Equipment & Supplies Rental (2174) | Ski Equipment Repair (236) |
| Ski Equipment Water & Snow Manufacturers (141) | Ski Equipment Wholesale (128) |
| Ski Lift & Ski Tow Equipment & Supplies (20) | Skilled Nursing Care Facilities (37896) |
| Skin Care & Cosmetology Salons (18808) | Skin Care & Treatment (25144) |
| Skin Diving Equipment & Supplies (130) | Skylights & Solariums (2181) |
| Skylights Manufacturers (13) | Skylights Wholesale (4) |
| Slab Jacking Contractors (16) | Slag (147) |
| Slate (393) | Sleds & Snow Equipment (2075) |
| Sleep Disorder Centers (1078) | Sleeping Bags (2) |
| Slicing Machines (163) | Slide Rules Manufacturers (12) |
| Slide Rules Wholesale (12) | Slides & Film (335) |
| Slides Computer Graphics (44) | Slings Manufacturers (13) |
| Slip Covers Ready & Custom Made (436) | Slip Covers Wholesale (29) |
| Slip Covers Wholesale & Manufacturers (28) | Slippers (11) |
| Slippers Wholesale (31) | Slitting & Sheeting Machines (2) |
| Slot Car Race Courses (17) | Slot Machines (48) |
| Slotted Angle Materials (2) | Slush Freezers & Machines (1) |
| Small Arms (53) | Small Claims Assistance (36) |
| Smelters & Refiners Base Metals (79) | Smelters & Refiners Equipment & Supplies (5) |
| Smelters & Refiners Precious Metals (270) | Smocking (3) |
| Smoke Abatement Equipment (55) | Smoke Odor Counteracting Services (853) |
| Smoke Stacks (49) | Smoked Foods (14) |
| Smokers Treatment Centers (1259) | Smoking & Curing Services (29) |
| Snack Foods (2482) | Snoring Treatment & Devices (38) |
| Snorkeling (188) | Snow Ball Machines Equipment & Supplies (19) |
| Snow Making Equipment (17) | Snow Melting Systems (18) |
| Snow Removal Equipment (4199) | Snow Removal Equipment Manufacturers (4) |
| Snow Removal Equipment Wholesale (65) | Snow Removal Service (16735) |
| Snowboard Equipment (2079) | Snowboards Wholesale & Manufacturers (10) |
| Snowmobile Club (47) | Snowmobile Parts & Accessories-Retail (446) |
| Snowmobile Rental & Leasing (477) | Snowmobile Repair (1615) |
| Snowmobiles (3978) | Snowmobiles Equipment & Supplies Manufacturers (18) |
| Snowshoes (53) | Snuff (1) |
| Soap & other detergents (31) | Soap Dispensers (7) |
| Soaps & Detergents (710) | Soccer Club (1654) |
| Soccer Equipment & Supplies (392) | Social Security Counselors & Representatives (804) |
| Social Service & Welfare Organizations (342964) | Social Settlements (29) |
| Social Workers & Services (8293) | Sod & Sodding Service (6614) |
| Sod & Sodding Service Commercial & Industrial (3) | Sod Cutting Machines (11) |
| Soda Ash Manufacturers (2) | Soda Bicarbonate (2) |
| Soda Fountain Equipment & Supplies (147) | Soda Fountain Equipment Repair (10) |
| Soda Fountain Shops (339) | Soda Water-Manufacturers (2) |
| Soft Drinks (155) | Soft Drinks Wholesale (8) |
| Softball Club (84) | Softwood Veneer & Plywood (Manufacturers) (1) |
| Soil (8133) | Soil Consultants (49) |
| Soil Plowing & Discing Services (114) | Soil Solidification (28) |
| Soil Stabilization (5) | Soil Testing Equipment (10) |
| Soils Potting (7) | Solar Energy Equipment (436) |
| Solar Energy Equipment & Supplies (1553) | Solar Energy Equipment & Systems Service & Repair (437) |
| Solar Energy Research & Development (114) | Solar Heating Consultants (7) |
| Solar Heating Contractors (47) | Solar Heating Systems (29) |
| Solariums Sunrooms & Atriums (5606) | Solder Equipment & Service (25) |
| Soldering Galvanizing & Tinning Fluxes (4) | Soldering Service (111) |
| Solenoids (31) | Solid Surface Materials (7) |
| Solvents (301) | Sonogram & Ultrasound Diagnosis (31) |
| Sound Control Structures & Equipment (112) | Sound System & Equipment Rental & Leasing (753) |
| Sound Systems & Equipment (Wholesale) (10544) | Sound Systems & Equipment Manufacturers (45) |
| Sound Systems & Equipment Repair (73) | Sound Systems & Recording Equipment (1512) |
| Sound Systems Consultants & Designers (262) | Soup (1) |
| Soup Kitchens (11) | Souvenirs & Favors (357) |
| Souvenirs & Favors Wholesale & Manufacturers (348) | Soy Manufacturers (6) |
| Soybean Production (159) | Soybean Products (159) |
| Space Components & Systems (32) | Space Education Programs (3) |
| Space Planning (292) | Space Research & Technology (439) |
| Spacer Tubes (4) | Spark Arrestors (5) |
| Spark Plugs (26) | Spas & Hot Tub Equipment (301) |
| Spas & Hot Tub Repair (3657) | Spas Builders (154) |
| Spas Health & Fitness (100) | Spas-Beauty & Day (11752) |
| Speakers Dealers (40) | Speakers Manufacturers (86) |
| Speakers Rebuild & Repair (311) | Speakers Wholesale (86) |
| Special Dies, Tools, Jigs & Fixtures (7) | Special Dies/Tools/Die Sets/ Jigs & Fixtures/Industrial Molds (5406) |
| Special Event Planning & Promoting (911) | Special Events Photographers (2315) |
| Special Industry Machinery (97) | Special Product Sawmills (21) |
| Special Trade Contractors (90209) | Special warehousing & storage (66111) |
| Specialized Libraries (701) | Specialty Hospitals Except Psychiatric (3925) |
| Specialty Outpatient Facilities (120374) | Specialty Plating (2646) |
| Specialty Products (40) | Specifications Consultants (31) |
| Speech & Language Pathology Information & Referral (78) | Speech & Language Therapy (9666) |
| Speech Aid Devices (101) | Speech Pathologists (9829) |
| Speed changers, drives, & gears (1) | Speed Reducers (91) |
| Speedometers (327) | Speedometers Repair (17) |
| Sperm Banks (69) | Spices Manufacturers (92) |
| Spices Wholesale (131) | Spill Control (443) |
| Spindles (46) | Spinning Wheels & Supplies (27) |
| Spiritualists (762) | Sponges (21) |
| Sponges Manufacturers (24) | Sponges Wholesale (24) |
| Spools (23) | Sporting & athletic goods (5803) |
| Sporting & Recreational Camps (12932) | Sporting & Recreational Goods & Supplies (7773) |
| Sporting Clays (6) | Sporting Goods (96652) |
| Sporting Goods Renting (5829) | Sporting Goods Used (185) |
| Sports Advisory Service (14) | Sports Club League (129) |
| Sports Consultants (173) | Sports Courts Construction Indoor & Outdoor (76) |
| Sports Facilities & Services (7078) | Sports Information Service (254) |
| Sports Motivational Training (49) | Sports Promoters Managers & Recruiters (1411) |
| Sports Psychology (7) | Sports Schools & Training Camps (551) |
| Sports Teams (98) | Sportswear (15632) |
| Sportswear Clothing (10579) | Sportswear-Wholesale (3358) |
| Spray Nozzles Industrial (3) | Spray Painting & Finishing (440) |
| Spraying Booth & Equipment Rental (217) | Spraying Booths & Equipment (4962) |
| Spraying Equipment Manufacturers (12) | Spraying Equipment Wholesale (27) |
| Springs Coil Flat Industrial Equipment & Supplies (544) | Springs Precision (31) |
| Springs-Automotive-Sales & Service (122) | Springs-Manufacturers (544) |
| Sprinkler Alarm Systems (566) | Sprinkler Supervisory Service (38) |
| Sprinkler Systems Equipment Parts & Supplies (639) | Sprinklers Automatic Fire Manufacturers (46) |
| Sprinklers Irrigation Designers (70) | Sprinklers Lawn & Irrigation (683) |
| Sprinklers-Automatic-Fire (Wholesale) (4118) | Sprockets (70) |
| Square Dance Apparel (80) | Square Dance Callers & Information (74) |
| Square Dancing Services (89) | Squash Courts (40) |
| Squash Equipment & Supplies (2) | Squeegees (1) |
| Stabilizers (14) | Stables (10362) |
| Stadiums Arenas & Athletic Fields (1721) | Staffing Services - Medical (6) |
| Stage & Platform Equipment Rental (196) | Stainers Wood (36) |
| Stainless & Alloy Pipe (23) | Stainproofing (13) |
| Stair Builders (1710) | Stair Equipment (Manufacturers) (1) |
| Stair Treads (36) | Stairs Disappearing (14) |
| Stairs Iron & Steel (16) | Stairs Manufacturers (291) |
| Stairs Resurfacing (29) | Stakes (129) |
| Stamp Dealers & Collectors Supplies (1203) | Stamp Machines (13) |
| Stamp Pads (47) | Stamping (16) |
| Stamping Cold Gold Hot Etc (16) | Stamping Equipment & Supplies (19) |
| Stamping Gold Leaf (27) | Stampings Non Metallic Manufacturers (14) |
| Stamps (32918) | Stamps Manufacturers (19) |
| Stanchions (2) | Staples, Staplers &Tackers Wholesale & Manufacturers (10) |
| Starch (19) | Starter Repair (3) |
| Starters Engines (868) | Starters Engines Manufacturers (3) |
| State Commercial Banks (7036) | State Courts (1477) |
| State Police (1150) | Static Control Equipment (76) |
| Stationery & office supplies (11725) | Stationery Manufacturers (1073) |
| Stationery Stores (29607) | Stationery Wholesale (1351) |
| Stationery, Tablets, & Related Products (460) | Statuary (958) |
| Statuary Materials Building (2) | Steam Bath Equipment & Supplies (109) |
| Steam Cleaning Commercial & Industrial (1868) | Steam Cleaning Equipment & Supplies (2598) |
| Steam Cleaning Equipment Manufacturers (29) | Steam Cleaning Equipment Rental (26) |
| Steam Cleaning-Residential (141) | Steam Fitters (11) |
| Steam Fitters Supplies (4) | Steam Thawing Contractors (62) |
| Steam Traps & Specialties (387) | Steamship Companies (1280) |
| Steel & Brass Stamps Manufacturers (51) | Steel & Metal Goods (9926) |
| Steel Brokers (153) | Steel Detailers Reinforcing (78) |
| Steel Detailers Structural (781) | Steel Foundries (1911) |
| Steel Frame Contractors (5) | Steel Joists (73) |
| Steel Mills (584) | Steel pipe & tubes (431) |
| Steel Processing (1201) | Steel Processing & Fabricating Equipment (270) |
| Steel Products (338) | Steel Rule Dies (23) |
| Steel Springs Manufacturers, Exc. Wire (546) | Steel Stainless (189) |
| Steel Straightening (14) | Steel Strapping Manufacturers (2) |
| Steel Structural (70) | Steel Tool & Alloy (12) |
| Steel Used (371) | Steel wire & related products (111) |
| Steel Wool (6) | Steel Work (999) |
| Steel, Heavy Machinery & Tool Storage (78) | Steel, Iron & Metal Fabricators (16441) |
| Steel-Wiredrawing/Nails/Spikes (Manufacturers) (108) | Steeplejacks (111) |
| Steeples & Spires (18) | Steering Systems & Equipment Manufacturers (2) |
| Steering Systems Repair (98) | Stencil & Stencil Supplies (361) |
| Stencil Cutting Machines (34) | Stenciling & Designing (41) |
| Stencils & Stencil Supplies Manufacturers (4) | Stenographer (702) |
| Stenographic Machines & Supplies (28) | Steps (Manufacturers) (1) |
| Stereo (478) | Stereo Audio & Video Equipment Wholesale (121) |
| Stereo Equipment & Parts (9360) | Stereo Equipment Manufacturers (278) |
| Stereo Equipment Rental & Leasing (135) | Stereo Equipment Repair (1766) |
| Stereographic Machines & Supplies (2) | Sterilizing Apparatus (35) |
| Sterilizing Service (81) | Stevedoring Contractors (494) |
| Stock & Bond Brokers (34957) | Stock Exchanges & Services (100) |
| Stock Photographers (590) | Stock Quotation Boards & Systems (24) |
| Stock Yards (1815) | Stocks & Bonds Transfer Agents (112) |
| Stokers (14) | Stone & Brick Artificial (102) |
| Stone & Stone Products (422) | Stone Building (118) |
| Stone Cast (919) | Stone Cast Manufacturers (3) |
| Stone Crushed (Wholesale) (6407) | Stone Crushed Retail (87) |
| Stone Crushing Equipment (6) | Stone Cutters (159) |
| Stone Natural Wholesale (5822) | Stoneware (18) |
| Stop Watches (2) | Storage (78459) |
| Storage & Parking Truck Trailers (146) | Storage Auto & Truck (1012) |
| Storage Auto Trailer & Recreational Vehicle (8813) | Storage Containers (44) |
| Storage Industrial & Commercial (51) | Storage Liquid & Bulk (353) |
| Storage-Household & Commercial (61537) | Store Designers & Planners (48) |
| Store Fixtures & Display Equipment (1403) | Store Fixtures Manufacturers (131) |
| Store Fixtures Used (124) | Store Fronts (2954) |
| Store Fronts Materials & Supplies (2824) | Storm Doors & Windows (3516) |
| Storm Shelter Contractors & Dealers (483) | Storm Shelters (63) |
| Storm Windows & Doors Manufacturers (25) | Storm Windows & Doors Repair & Service (503) |
| Storm Windows & Doors Wholesale (11) | Stove Pipe (2) |
| Stoves Wood Gas Coal (3533) | Stoves-Wood, Pellet, Coal & Gas Manufacturers (229) |
| Strainers Wholesale (51) | Strapping & Strapping Equipment (469) |
| Straw Goods (30) | Straws Drinking (6) |
| Street Cleaning Equipment (Manufacturers) (1) | Street Cleaning Services (305) |
| Street Lighting Contractors (31) | Street Lighting Standards & Equipment (33) |
| Stress Management & Counseling (2231) | Stress Relief Equipment & Service (21) |
| Stretch & Shrink Film (25) | Stripe Painters (25) |
| Stripers Mechanical (102) | Structural Clay Products (12) |
| Structural Wood Members (46) | Structured Settlement Buyer (1) |
| Struts & Strut Supports (2300) | Stucco Manufacturers (452) |
| Stucco, Granite & Grouting Contractors (3626) | Stucco-Distributors (3263) |
| Student Exchange Programs (95) | Studios Rental (669) |
| Stuntmen (1) | Styrofoam Products (15) |
| Substance Abuse Clinics (19358) | Substance Abuse Counseling Services (1323) |
| Sugar-Brokers & Wholesalers (247) | Sugarcane & Sugar Beets (1) |
| Suicide Prevention Service & Counseling (1582) | Sulphur (25) |
| Sun Glasses & Sun Goggles (5719) | Sun Glasses & Sun Goggles Manufacturers (191) |
| Sun Glasses & Sun Goggles Wholesale (6) | Sun Lamps (11) |
| Sun Rooms & Solarium Construction (9357) | Sun Rooms, Greenhouses, Solariums & Atrium Builders (3619) |
| Sun Tan Preparations (33) | Sundries Wholesale (2) |
| Sunflower Seed Processing (14) | Suppliers (3) |
| Support Groups (1442) | Surface Plates (25) |
| Surface Preparation & Equipment (9) | Surfboards & Equipment (1588) |
| Surfboards Manufacturers (112) | Surfboards Wholesale (114) |
| Surge Protection Equipment (65) | Surgical appliances & supplies (410) |
| Surgical Appliances & Supplies Manufacturers (1) | Surgical Centers (1475) |
| Surgical Corsets (11) | Surgical Dressings Manufacturers (1) |
| Surgical Equipment & Supplies (5275) | Surgical Instruments Manufacturers (20) |
| Surplus & Salvage Merchandise (2266) | Surplus & Salvage Merchandise Wholesale & Manufacturers (12) |
| Survey Interviewing & Reports (73) | Surveying Instruments & Supplies (922) |
| Surveying Instruments Manufacturers (9) | Surveying Services (20306) |
| Surveyor Instrument & Supplies Repair (23) | Surveyors (2260) |
| Surveyors Aerial (481) | Surveyors Cargo (72) |
| Surveyors City (33) | Surveyors Construction (229) |
| Surveyors Hydrographic (22) | Surveyors Industrial (48) |
| Surveyors Mineral (12) | Surveyors Water Rights (200) |
| Surveyors-Land (19731) | Survival & Life Support Equipment & Supplies (20) |
| Survival Products & Supplies (116) | Swaging Machines (Manufacturers) (15) |
| Swap Meets & Shops (6) | Swatching (14) |
| Sweat Shirts (Wholesale) (1) | Sweaters (96) |
| Sweaters Trimming Service (11) | Sweaters Wholesale & Manufacturers (31) |
|