SIC 6-Digit Codes for "system-optimization-support-ltd"

SIC Marketing Level codes provide more specific industry categories within official 4-digit SIC classifications, supporting more precise industry segmentation, market research, and business targeting. For official SIC classification, use the 4-digit SIC code.

Search this keyword in NAICS 8-Digit codes.

companies

Industry	SIC 6-Digit	U.S. companies
Computers-Support Services Parent: Computer Related Services, Not Elsewhere Classified	SIC Marketing Level 7379-11	companies 703companies
Litigation Support Service Parent: Detective, Guard, and Armored Car Services	SIC Marketing Level 7381-16	companies 201companies
Word Processing Systems-Conslnts/Design Parent: Computer Related Services, Not Elsewhere Classified	SIC Marketing Level 7379-03	companies
Satellite Equipment & Systems-Service & Repair Parent: Radio and Television Repair Shops	SIC Marketing Level 7622-13	companies 266companies
Fiber Optics-Systems Consultants Parent: Business Consulting Services, Not Elsewhere Classified	SIC Marketing Level 8748-82	companies 4companies
Data Communications Systems-Networks Parent: Computer Integrated Systems Design	SIC Marketing Level 7373-04	companies 234companies
Energy Management Control Systems (Manufacturing) Parent: Automatic Controls for Regulating Residential and Commercial Environments and Appliances	SIC Marketing Level 3822-08	companies 41companies
Farm Management Systems Parent: Business Consulting Services, Not Elsewhere Classified	SIC Marketing Level 8748-48	companies 17companies
Computers-System Designers & Consultants Parent: Computer Programming Services	SIC Marketing Level 7371-03	companies 3,564companies
Sound System Consultants Parent: Services Allied to Motion Picture Production	SIC Marketing Level 7819-10	companies 59companies
Septic Tanks/Systems-Cleaning Repair Parent: Plumbing, Heating and Air-Conditioning	SIC Marketing Level 1711-07	companies 3,684companies
Mufflers & Exhaust Systems-Engine Parent: Automotive Exhaust System Repair Shops	SIC Marketing Level 7533-01	companies 1,833companies
Abdominal Supports (Wholesale) Parent: Drugs, Drug Proprietaries, and Druggists' Sundries	SIC Marketing Level 5122-02	companies 1companies
Back Supports Parent: Medical Equipment Rental and Leasing	SIC Marketing Level 7352-05	companies 31companies
Support Groups Parent: Individual and Family Social Services	SIC Marketing Level 8322-33	companies 289companies
Information System Consultants Parent: Computer Related Services, Not Elsewhere Classified	SIC Marketing Level 7379-06	companies 47companies
Sewer System Inspection/Rehabilitation Parent: Sewerage Systems	SIC Marketing Level 4952-05	companies 9companies
Maternity Apparel & Supports (Retail) Parent: Women's Clothing Stores	SIC Marketing Level 5621-03	companies 90companies
Information Retrieval Systems Equipment (Wholesale) Parent: Computers and Computer Peripheral Equipment and Software	SIC Marketing Level 5045-04	companies 33companies
Pneumatic Tube Equipment & Systems Parent: Installation or Erection of Building Equipment, Not Elsewhere Classified	SIC Marketing Level 1796-07	companies 18companies
Water System Billing Management & Supplies Parent: Combination Utilities, Not Elsewhere Classified	SIC Marketing Level 4939-05	companies 1companies
Trucking Consultants Parent: Arrangement of Transportation of Freight and Cargo	SIC Marketing Level 4731-25	companies 49companies
Internet Services-Network Designers/Conslnt Parent: Computer Integrated Systems Design	SIC Marketing Level 7373-14	companies 776companies
Computers-Enhancements Parent: Computer Related Services, Not Elsewhere Classified	SIC Marketing Level 7379-07	companies 7companies
Oil & Gas Services Parent: Oil and Gas Field Exploration Services	SIC Marketing Level 1382-08	companies 350companies
Farm Drainage Parent: Farm Management Services	SIC Marketing Level 0762-05	companies 16companies
Electronics-Consultants Parent: Computer Related Services, Not Elsewhere Classified	SIC Marketing Level 7379-02	companies 491companies
Internet Management & Maintenance Parent: Management Services	SIC Marketing Level 8741-26	companies 25companies
Machinery-Sawmill (Manufacturing) Parent: Woodworking Machinery	SIC Marketing Level 3553-06	companies 6companies
Computers-Networking Parent: Computer Related Services, Not Elsewhere Classified	SIC Marketing Level 7379-04	companies 1,546companies
Heating Contractors Parent: Plumbing, Heating and Air-Conditioning	SIC Marketing Level 1711-02	companies 14,806companies
Septic Tanks Parent: Plumbing, Heating and Air-Conditioning	SIC Marketing Level 1711-08	companies 1,563companies
Trusses-Medical & Surgical (Wholesale) Parent: Medical, Dental, and Hospital Equipment and Supplies	SIC Marketing Level 5047-09	companies 1companies
Foot Appliances (Wholesale) Parent: Medical, Dental, and Hospital Equipment and Supplies	SIC Marketing Level 5047-26	companies
Closets & Closet Accessories (Wholesale) Parent: Home Furnishings	SIC Marketing Level 5023-09	companies 520companies
Bowling Apparel & Accessories (Wholesale) Parent: Sporting and Recreational Goods and Supplies	SIC Marketing Level 5091-29	companies
Orthopedic Appliances (Retail) Parent: Miscellaneous Retail Stores, Not Elsewhere Classified	SIC Marketing Level 5999-33	companies 466companies
Foot Appliances (Retail) Parent: Miscellaneous Retail Stores, Not Elsewhere Classified	SIC Marketing Level 5999-86	companies 35companies
Pipe Hangers (Manufacturing) Parent: Valves and Pipe Fittings, Not Elsewhere Classified	SIC Marketing Level 3494-01	companies 14companies
Bowling Apparel & Accessories (Retail) Parent: Sporting Goods Stores and Bicycle Shops	SIC Marketing Level 5941-39	companies 413companies
Foot Remedies (Manufacturing) Parent: Orthopedic, Prosthetic, and Surgical Appliances and Supplies	SIC Marketing Level 3842-16	companies 4companies
Internet Home Page Dev Consulting Parent: Computer Processing and Data Preparation and Processing Services	SIC Marketing Level 7374-16	companies 1,930companies
Operations Research Parent: Commercial Physical and Biological Research	SIC Marketing Level 8731-35	companies 13companies
Sprinklers-Automatic-Fire (Wholesale) Parent: Service Establishment Equipment and Supplies	SIC Marketing Level 5087-34	companies 411companies
Crossarms (Manufacturing) Parent: Millwork	SIC Marketing Level 2431-06	companies 4companies
Developmentally Disabled Info Services Parent: Job Training and Vocational Rehabilitation Services	SIC Marketing Level 8331-10	companies 203companies
Shoe Fillers (Manufacturing) Parent: Boot and Shoe Cut Stock and Findings	SIC Marketing Level 3131-06	companies
Steel-Structural (Manufacturing) Parent: Fabricated Structural Metal	SIC Marketing Level 3441-06	companies 2,288companies
Orthopedic Appliances (Manufacturing) Parent: Orthopedic, Prosthetic, and Surgical Appliances and Supplies	SIC Marketing Level 3842-05	companies 57companies
Foot Appliances (Manufacturing) Parent: Orthopedic, Prosthetic, and Surgical Appliances and Supplies	SIC Marketing Level 3842-12	companies 2companies
Orthopedic Appliances (Wholesale) Parent: Medical, Dental, and Hospital Equipment and Supplies	SIC Marketing Level 5047-24	companies 4companies
Grain Elevators Repairing Parent: General Contractors-Industrial Buildings and Warehouses	SIC Marketing Level 1541-08	companies 4companies
Gas Well Servicing Parent: Oil and Gas Field Services, Not Elsewhere Classified	SIC Marketing Level 1389-20	companies 44companies
Oil Well Wire Line Service Parent: Oil and Gas Field Services, Not Elsewhere Classified	SIC Marketing Level 1389-23	companies 4companies
Transportation Services NEC Parent: Transportation Services, Not Elsewhere Classified	SIC Marketing Level 4789-99	companies 213companies
Vending Brokers (Wholesale) Parent: Commercial Equipment, Not Elsewhere Classified	SIC Marketing Level 5046-43	companies 5companies
Online Publications (Manufacturing) Parent: Periodicals: Publishing, or Publishing and Printing	SIC Marketing Level 2721-09	companies 36companies
Truck-Permit Service Parent: Arrangement of Transportation of Freight and Cargo	SIC Marketing Level 4731-16	companies 77companies
Shippers Cooperative Organizations Parent: Business Associations	SIC Marketing Level 8611-10	companies
Oil Field Consultants Parent: Business Consulting Services, Not Elsewhere Classified	SIC Marketing Level 8748-46	companies 34companies
Resource & Referrals Parent: Services, Not Elsewhere Classified	SIC Marketing Level 8999-79	companies 195companies
Internet Artists Social Network (Manufacturing) Parent: Miscellaneous Publishing	SIC Marketing Level 2741-28	companies 8companies
Electric Companies Parent: Electric Services	SIC Marketing Level 4911-01	companies 2,515companies
Engineers-Power Parent: Engineering Services	SIC Marketing Level 8711-55	companies 33companies
Rfid (Radio Frequency Identification) Parent: Computer Processing and Data Preparation and Processing Services	SIC Marketing Level 7374-26	companies 11companies
Energy Conservation & Mgmt Consultants Parent: Management Consulting Services	SIC Marketing Level 8742-12	companies 1,338companies
Traffic Condition Information Parent: Business Consulting Services, Not Elsewhere Classified	SIC Marketing Level 8748-88	companies 2companies
Resume Service Parent: Secretarial and Court Reporting Services	SIC Marketing Level 7338-03	companies 439companies
Advertising-Agencies & Counselors Parent: Advertising Agencies	SIC Marketing Level 7311-01	companies 6,760companies
Parking Consultants Parent: Automobile Parking	SIC Marketing Level 7521-03	companies 19companies
Information Management Parent: Services, Not Elsewhere Classified	SIC Marketing Level 8999-53	companies 67companies
Oil Well Testing Parent: Oil and Gas Field Services, Not Elsewhere Classified	SIC Marketing Level 1389-11	companies 12companies
Bus Lines-Ticket Agencies Parent: Arrangement of Passenger Transportation, Not Elsewhere Classified	SIC Marketing Level 4729-03	companies 11companies
Sawmill Consultants (Manufacturing) Parent: Sawmills and Planing Mills, General	SIC Marketing Level 2421-06	companies 1companies
Shopper's Information Service Parent: Advertising, Not Elsewhere Classified	SIC Marketing Level 7319-23	companies
Traffic Reports Parent: News Syndicates	SIC Marketing Level 7383-03	companies 7companies
Brain State Conditioning Parent: Offices and Clinics of Health Practitioners, Not Elsewhere Classified	SIC Marketing Level 8049-95	companies 14companies
Oil Well Logging & Perforating Parent: Oil and Gas Field Services, Not Elsewhere Classified	SIC Marketing Level 1389-10	companies 16companies
Scientists-Consulting Parent: Services, Not Elsewhere Classified	SIC Marketing Level 8999-04	companies 4,929companies
Expertise & Technical Analysis Parent: Business Consulting Services, Not Elsewhere Classified	SIC Marketing Level 8748-62	companies 21companies
Consultants Usability Parent: Computer Integrated Systems Design	SIC Marketing Level 7373-18	companies 2companies
Management Research Parent: Management Consulting Services	SIC Marketing Level 8742-49	companies 8companies
Foreign Sales Corporation-Management Parent: Management Consulting Services	SIC Marketing Level 8742-67	companies 1companies
International Marketing Parent: Management Consulting Services	SIC Marketing Level 8742-47	companies 28companies
Data Processing Software Parent: Prepackaged Software	SIC Marketing Level 7372-02	companies 161companies
Physical Therapy Equipment (Wholesale) Parent: Medical, Dental, and Hospital Equipment and Supplies	SIC Marketing Level 5047-01	companies 168companies
Tubing-Metal (Wholesale) Parent: Metals Service Centers and Offices	SIC Marketing Level 5051-10	companies 49companies
Schools-Cognitive Disabilities Parent: Elementary and Secondary Schools	SIC Marketing Level 8211-06	companies 26companies
Animal Health Products (Manufacturing) Parent: Prepared Feed and Feed Ingredients for Animals and Fowls, Except Dogs and Cats	SIC Marketing Level 2048-01	companies 101companies
Student Housing Parent: Rooming and Boarding Houses	SIC Marketing Level 7021-06	companies 613companies
Chairs-Orthopedic & Lift (Wholesale) Parent: Medical, Dental, and Hospital Equipment and Supplies	SIC Marketing Level 5047-14	companies 12companies
Television Studio Equipment (Wholesale) Parent: Electronic Parts and Equipment, Not Elsewhere Classified	SIC Marketing Level 5065-25	companies 20companies
Structures Air Supported Parent: General Contractors-Nonresidential Buildings, other than Industrial Buildings and Warehouses	SIC Marketing Level 1542-24	companies 2companies
Piping Contractors Parent: Water, Sewer, Pipeline, and Communications and Power Line Construction	SIC Marketing Level 1623-02	companies 138companies
Rolling Mill Machinery (Manufacturing) Parent: Rolling Mill Machinery and Equipment	SIC Marketing Level 3547-02	companies 21companies
Warehouses-Commodity & Merchandise Parent: Farm Product Warehousing and Storage	SIC Marketing Level 4221-05	companies 340companies
Warehouses-Steel & Heavy Machinery Parent: Special Warehousing and Storage, Not Elsewhere Classified	SIC Marketing Level 4226-09	companies 11companies
Roof Curbs (Manufacturing) Parent: Sheet Metal Work	SIC Marketing Level 3444-15	companies 2companies
Posts-Corner Posts (Wholesale) Parent: Durable Goods, Not Elsewhere Classified	SIC Marketing Level 5099-37	companies 2companies
Fishing Lake Management Parent: Hunting, Trapping, Game Propagation	SIC Marketing Level 0971-05	companies 20companies
Water Wheels Parent: Water Well Drilling	SIC Marketing Level 1781-06	companies 3companies
Brass (Wholesale) Parent: Plumbing and Heating Equipment and Supplies (Hydronics)	SIC Marketing Level 5074-26	companies 2companies
Ceramic Products-Industrial (Wholesale) Parent: Nondurable Goods, Not Elsewhere Classified	SIC Marketing Level 5199-62	companies 2companies
Bowling Apparel & Accessories (Manufacturing) Parent: Apparel and Accessories, Not Elsewhere Classified	SIC Marketing Level 2389-07	companies 2companies
Silica Gel (Manufacturing) Parent: Industrial Inorganic Chemicals, Not Elsewhere Classified	SIC Marketing Level 2819-13	companies 1companies
Electronic Enclosures (Manufacturing) Parent: Metal Stampings, Not Elsewhere Classified	SIC Marketing Level 3469-18	companies 5companies
Industrial Patterns (Manufacturing) Parent: Industrial Patterns	SIC Marketing Level 3543-02	companies 45companies
Print Blocks (Manufacturing) Parent: Printing Trades Machinery and Equipment	SIC Marketing Level 3555-05	companies 1companies
Cash Registers & Supplies Repairing (Wholesale) Parent: Office Equipment	SIC Marketing Level 5044-27	companies 4companies
Podiatrists Equipment & Supplies (Wholesale) Parent: Medical, Dental, and Hospital Equipment and Supplies	SIC Marketing Level 5047-21	companies 127companies
Architects Supplies (Wholesale) Parent: Professional Equipment and Supplies, Not Elsewhere Classified	SIC Marketing Level 5049-01	companies 55companies
Heavy Construction Equipment-Rental Parent: Heavy Construction Equipment Rental and Leasing	SIC Marketing Level 7353-98	companies 414companies
Power Tool Supplies & Repairs Parent: Repair Shops and Related Services, Not Elsewhere Classified	SIC Marketing Level 7699-38	companies 220companies
Food Facilities-Consultants Parent: Business Consulting Services, Not Elsewhere Classified	SIC Marketing Level 8748-31	companies 281companies
Exploration Consultants Parent: Oil and Gas Field Exploration Services	SIC Marketing Level 1382-09	companies 4companies
Vehicle Tracking Devices (Retail) Parent: Auto and Home Supply Stores	SIC Marketing Level 5531-44	companies 27companies
Shopping Center Consultants Parent: Operators of Nonresidential Buildings	SIC Marketing Level 6512-07	companies 1companies
Routing Service-Air/Highway/Marine Parent: Arrangement of Transportation of Freight and Cargo	SIC Marketing Level 4731-18	companies 3companies
Transportation Lines Parent: Arrangement of Transportation of Freight and Cargo	SIC Marketing Level 4731-12	companies 189companies
Freight-Traffic Managers Parent: Arrangement of Transportation of Freight and Cargo	SIC Marketing Level 4731-19	companies 16companies
Trucking Management Parent: Trucking, except Local	SIC Marketing Level 4213-21	companies 12companies
Logistics Parent: Management Consulting Services	SIC Marketing Level 8742-66	companies
Naval Architects Parent: Engineering Services	SIC Marketing Level 8711-01	companies 42companies
Freight-Forwarding Parent: Arrangement of Transportation of Freight and Cargo	SIC Marketing Level 4731-04	companies 3,548companies
Transportation Services Parent: Local Passenger Transportation, Not Elsewhere Classified	SIC Marketing Level 4119-14	companies 3,018companies
Interstate Commerce Commission Prctnrs Parent: Arrangement of Transportation of Freight and Cargo	SIC Marketing Level 4731-22	companies 9companies
Trucking-Transportation Brokers Parent: Trucking, except Local	SIC Marketing Level 4213-03	companies 827companies
Truck-Transporting Parent: Local Trucking without Storage	SIC Marketing Level 4212-14	companies 70companies
Freight-Traffic Consultants Parent: Business Consulting Services, Not Elsewhere Classified	SIC Marketing Level 8748-34	companies 21companies
Transportation Consultants Parent: Arrangement of Transportation of Freight and Cargo	SIC Marketing Level 4731-01	companies 3,242companies
Online Services Parent: Information Retrieval Services	SIC Marketing Level 7375-05	companies 521companies
Freight-Consolidating Parent: Arrangement of Transportation of Freight and Cargo	SIC Marketing Level 4731-02	companies 71companies
Advertising-Directory & Guide Parent: Advertising Agencies	SIC Marketing Level 7311-03	companies 191companies
Job Listing Service Parent: Employment Agencies	SIC Marketing Level 7361-13	companies 71companies
Transportation Parent: Transportation Services, Not Elsewhere Classified	SIC Marketing Level 4789-77	companies 10,634companies
Dispatch Service-Trucking Parent: Terminal and Joint Terminal Maintenance Facilities for Motor Freight Transportation	SIC Marketing Level 4231-02	companies 149companies
Legal Marketing Parent: Legal Services	SIC Marketing Level 8111-18	companies 13companies
Truck Renting & Leasing Parent: Truck Rental and Leasing without Drivers	SIC Marketing Level 7513-03	companies 20,491companies
Department Stores (Retail) Parent: Department Stores	SIC Marketing Level 5311-02	companies 14,744companies
Marketing Programs & Services Parent: Management Consulting Services	SIC Marketing Level 8742-13	companies 13,297companies
Distribution Services Parent: Advertising, Not Elsewhere Classified	SIC Marketing Level 7319-08	companies 7,175companies
Accessories-Fashion (Retail) Parent: Women's Accessory and Specialty Stores	SIC Marketing Level 5632-15	companies 1,433companies
Meal/Grocery Order & Delivery Services (Retail) Parent: Direct Selling Establishments	SIC Marketing Level 5963-09	companies 419companies
Freight-Traffic Service Parent: Arrangement of Transportation of Freight and Cargo	SIC Marketing Level 4731-06	companies 66companies
Shipping Consultants Parent: Business Consulting Services, Not Elsewhere Classified	SIC Marketing Level 8748-12	companies 30companies
Transportation Equipment-Leasing Parent: Transportation Services, Not Elsewhere Classified	SIC Marketing Level 4789-09	companies 5companies
Resident Buyers (Retail) Parent: Department Stores	SIC Marketing Level 5311-01	companies 5companies
Travel Marketing Parent: Management Consulting Services	SIC Marketing Level 8742-10	companies 19companies
Marketing Consultants Parent: Management Consulting Services	SIC Marketing Level 8742-14	companies 6,519companies
Media Consultants Parent: Business Consulting Services, Not Elsewhere Classified	SIC Marketing Level 8748-56	companies 548companies
Brokers-Motor Transportation Parent: Arrangement of Transportation of Freight and Cargo	SIC Marketing Level 4731-05	companies 33companies
Media Brokers Parent: Radio, Television, and Publishers' Advertising Representatives	SIC Marketing Level 7313-04	companies 117companies
Advertising NEC Parent: Advertising, Not Elsewhere Classified	SIC Marketing Level 7319-99	companies 1,725companies
Internet Search Engines Parent: Computer Processing and Data Preparation and Processing Services	SIC Marketing Level 7374-19	companies 174companies
Lingerie (Wholesale) Parent: Women's, Children's, and Infants' Clothing and Accessories	SIC Marketing Level 5137-19	companies 22companies
On Line Directory (Manufacturing) Parent: Miscellaneous Publishing	SIC Marketing Level 2741-29	companies 15companies
Electronic Retailing Parent: Radio, Television, and Consumer Electronics Stores	SIC Marketing Level 5731-24	companies 481companies
Recyclables-Pick Up Service Parent: Local Trucking without Storage	SIC Marketing Level 4212-21	companies 21companies
Consultants-Referral Service Parent: Management Consulting Services	SIC Marketing Level 8742-15	companies 131companies
Petroleum Consultants Parent: Business Services, Not Elsewhere Classified	SIC Marketing Level 7389-92	companies 95companies
Gymnastic Instruction Parent: Amusement and Recreation Services, Not Elsewhere Classified	SIC Marketing Level 7999-36	companies 2,197companies
Bowling Instruction Parent: Amusement and Recreation Services, Not Elsewhere Classified	SIC Marketing Level 7999-16	companies 15companies
Horticultural Equipment (Manufacturing) Distributors Parent: Lawn and Garden Tractors and Home Lawn and Garden Equipment	SIC Marketing Level 3524-04	companies 18companies
Livestock Services-Except Veterinary Parent: Livestock Services, except Veterinary	SIC Marketing Level 0751-98	companies 110companies
Tree Consultants Parent: Landscape Counseling and Planning	SIC Marketing Level 0781-08	companies 51companies
Health Appliances (Wholesale) Parent: Medical, Dental, and Hospital Equipment and Supplies	SIC Marketing Level 5047-10	companies 10companies
Rods-Threaded (Wholesale) Parent: Metals Service Centers and Offices	SIC Marketing Level 5051-50	companies 3companies
Pipe-Used (Wholesale) Parent: Plumbing and Heating Equipment and Supplies (Hydronics)	SIC Marketing Level 5074-03	companies 21companies
Pipe-Plastic (Wholesale) Parent: Plastics Materials and Basic Forms and Shapes	SIC Marketing Level 5162-10	companies 13companies
Shoes-Dance (Retail) Parent: Shoe Stores	SIC Marketing Level 5661-11	companies 11companies
Surgical Appliances (Retail) Parent: Miscellaneous Retail Stores, Not Elsewhere Classified	SIC Marketing Level 5999-13	companies 119companies
Photo-Modeling Studios Parent: Commercial Photography	SIC Marketing Level 7335-06	companies 8companies
Pipe-Renting Parent: Equipment Rental and Leasing, Not Elsewhere Classified	SIC Marketing Level 7359-89	companies 5companies
Cheerleading Instructions Parent: Membership Sports and Recreation Clubs	SIC Marketing Level 7997-32	companies 278companies
Emergency Chiropractic Service Parent: Offices and Clinics of Chiropractors	SIC Marketing Level 8041-03	companies 24companies
Naprapaths Parent: Health and Allied Services, Not Elsewhere Classified	SIC Marketing Level 8099-17	companies 36companies
Spinal Decompression Parent: Health and Allied Services, Not Elsewhere Classified	SIC Marketing Level 8099-73	companies 16companies
Engineers-Pipe Line Parent: Engineering Services	SIC Marketing Level 8711-65	companies 17companies
Oil & Gas Consultant Parent: Oil and Gas Field Exploration Services	SIC Marketing Level 1382-04	companies 101companies
Online Retailers & Marketplaces Parent: Catalog and Mail-Order Houses	SIC Marketing Level 5961-02	companies 1,149companies
Retirement Income Funds Parent: Investment Advice	SIC Marketing Level 6282-10	companies 39companies
Advertising-Newspaper Parent: Advertising Agencies	SIC Marketing Level 7311-06	companies 287companies
Advertising-Shoppers' Guides Parent: Advertising Agencies	SIC Marketing Level 7311-07	companies 16companies
Golf Advertising Parent: Advertising Agencies	SIC Marketing Level 7311-14	companies 6companies
Advertising Marketing Parent: Advertising Agencies	SIC Marketing Level 7311-15	companies 2,710companies
Publishers-Representatives Parent: Radio, Television, and Publishers' Advertising Representatives	SIC Marketing Level 7313-02	companies 72companies

Other classifications

Search "system-optimization-support-ltd" in Extended NAICS →

Sources & methodology

NAICS definitions: U.S. Census Bureau, 2022

SIC definitions: OSHA SIC Manual

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SIC 6-Digit Codes for "system-optimization-support-ltd"

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