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Official North American industry classification system for business reporting and analysis.

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What Is a NAICS 8-Digit Code?
All NAICS SIC Companies
SIC 6-Digit NAICS 8-Digit ISIC (International) NACE (Europe) SOC (Occupations) CIP (Programs) Extended SOC (O*NET)

NAICS 8-Digit Codes for "integrated-support-systems"

Extended NAICS codes provide more specific industry categories within official 6-digit NAICS classifications, supporting more precise industry segmentation, market research, and business targeting. For official NAICS classification, use the 6-digit NAICS code.

Search this keyword in SIC 6-Digit codes.

companies

Verified U.S. companies available for purchase in this industry. Counts are based on primary business classifications.

Industry NAICS 8-Digit U.S. companies Add

Cad Systems & Services

Parent: Computer Systems Design Services

Extended NAICS 541512-01 companies 171companies

Library Support Services

Parent: Administrative Management and General Management Consulting Services

Extended NAICS 541611-21 companies 34companies

Computer Integrated Systems Design

Parent: Computer Systems Design Services

Extended NAICS 541512-04 companies 6,514companies

Engineers-Systems

Parent: Computer Systems Design Services

Extended NAICS 541512-13 companies 66companies

Data Communications Systems-Networks

Parent: Computer Systems Design Services

Extended NAICS 541512-09 companies 234companies

Donor Recognition Systems

Parent: Computer Systems Design Services

Extended NAICS 541512-10 companies 6companies

Data Acquisition Systems

Parent: Computer Systems Design Services

Extended NAICS 541512-22 companies 16companies

Abdominal Supports (Wholesale)

Parent: Drugs and Druggists' Sundries Merchant Wholesalers

Extended NAICS 424210-01 companies 1companies

Back Supports

Parent: Home Health Equipment Rental

Extended NAICS 532283-04 companies 31companies

Roof-Screen Support Systems

Parent: Roofing Contractors

Extended NAICS 238160-12 companies 1companies

Intercommunication Equipment Systems Service (Wholesale)

Parent: Other Electronic Parts and Equipment Merchant Wholesalers

Extended NAICS 423690-19 companies 94companies

Security Systems Consultants

Parent: Other Management Consulting Services

Extended NAICS 541618-13 companies 757companies

Liquor Control Systems (Wholesale)

Parent: Other Commercial Equipment Merchant Wholesalers

Extended NAICS 423440-19 companies 3companies

Visual Control Systems (Wholesale)

Parent: Electrical Apparatus and Equipment, Wiring Supplies, and Related Equipment Merchant Wholesalers

Extended NAICS 423610-83 companies 5companies

Warning Systems

Parent: Security Systems Services (except Locksmiths)

Extended NAICS 561621-13 companies 6companies

Information System Consultants

Parent: Computer Systems Design Services

Extended NAICS 541512-15 companies 47companies

Word Processing Systems-Conslnts/Design

Parent: Computer Systems Design Services

Extended NAICS 541512-18 companies —

Integrated Medicine

Parent: All Other Outpatient Care Centers

Extended NAICS 621498-12 companies 38companies

Home Integration (Wholesale) (Retail)

Parent: Electronics and Appliance Retailers

Extended NAICS 449210-84 companies 5companies

Voice-Data Network-Internet Service-Internet

Parent: Computer Systems Design Services

Extended NAICS 541512-23 companies 27companies

Computer Consultants

Parent: Computer Systems Design Services

Extended NAICS 541512-02 companies 946companies

Computers Equipment ment Installation

Parent: Computer Systems Design Services

Extended NAICS 541512-06 companies 29companies

Electronics-Consultants

Parent: Computer Systems Design Services

Extended NAICS 541512-12 companies 491companies

Robotic Components

Parent: Computer Systems Design Services

Extended NAICS 541512-16 companies 38companies

Circuit Boards (Manufacturing)

Parent: Bare Printed Circuit Board Manufacturing

Extended NAICS 334412-02 companies 225companies

Semiconductors & Related Devices (Manufacturing)

Parent: Semiconductor and Related Device Manufacturing

Extended NAICS 334413-03 companies 690companies

Semiconductor Devices (Manufacturing)

Parent: Semiconductor and Related Device Manufacturing

Extended NAICS 334413-02 companies 640companies

Microprocessors (Wholesale)

Parent: Other Electronic Parts and Equipment Merchant Wholesalers

Extended NAICS 423690-21 companies 2companies

Engineers-Plumbing

Parent: Engineering Services

Extended NAICS 541330-49 companies 24companies

Amplifiers (Manufacturing)

Parent: Audio and Video Equipment Manufacturing

Extended NAICS 334310-01 companies 10companies

Iso Certification

Parent: Testing Laboratories and Services

Extended NAICS 541380-17 companies 60companies

Electronic Equipment & Supplies (Manufacturing)

Parent: Other Electronic Component Manufacturing

Extended NAICS 334419-02 companies 1,275companies

Engineers-Electronic

Parent: Engineering Services

Extended NAICS 541330-23 companies 378companies

Radio Equipment & Parts (Manufacturing)

Parent: Radio and Television Broadcasting and Wireless Communications Equipment Manufacturing

Extended NAICS 334220-06 companies 2companies

Orthopedic Appliances (Wholesale)

Parent: Medical, Dental, and Hospital Equipment and Supplies Merchant Wholesalers

Extended NAICS 423450-21 companies 4companies

Foot Appliances (Manufacturing)

Parent: Surgical Appliance and Supplies Manufacturing

Extended NAICS 339113-08 companies 2companies

Foot Remedies (Manufacturing)

Parent: Surgical Appliance and Supplies Manufacturing

Extended NAICS 339113-09 companies 4companies

Orthopedic Appliances (Retail)

Parent: All Other Health and Personal Care Retailers

Extended NAICS 456199-05 companies 466companies

Bowling Apparel & Accessories (Manufacturing)

Parent: Apparel Accessories and Other Apparel Manufacturing

Extended NAICS 315990-31 companies 2companies

Bowling Apparel & Accessories (Wholesale)

Parent: Sporting and Recreational Goods and Supplies Merchant Wholesalers

Extended NAICS 423910-07 companies —

Foot Appliances (Wholesale)

Parent: Medical, Dental, and Hospital Equipment and Supplies Merchant Wholesalers

Extended NAICS 423450-10 companies —

Foot Appliances (Retail)

Parent: All Other Health and Personal Care Retailers

Extended NAICS 456199-02 companies 35companies

Surgical Appliances (Retail)

Parent: All Other General Merchandise Retailers

Extended NAICS 455219-25 companies 119companies

Closets & Closet Accessories (Wholesale)

Parent: Home Furnishing Merchant Wholesalers

Extended NAICS 423220-11 companies 520companies

Vineyard Products & Supplies (Wholesale)

Parent: Service Establishment Equipment and Supplies Merchant Wholesalers

Extended NAICS 423850-81 companies 7companies

Conveyor Parts & Supplies (Manufacturing)

Parent: Conveyor and Conveying Equipment Manufacturing

Extended NAICS 333922-02 companies 25companies

Utilities-Undrgrnd-Cbl Pipe/Wire (Wholesale)

Parent: Electrical Apparatus and Equipment, Wiring Supplies, and Related Equipment Merchant Wholesalers

Extended NAICS 423610-80 companies 12companies

Bowling Lane Equipment & Supplies (Wholesale)

Parent: Sporting and Recreational Goods and Supplies Merchant Wholesalers

Extended NAICS 423910-08 companies 45companies

Pipe Hangers (Manufacturing)

Parent: All Other Miscellaneous Fabricated Metal Product Manufacturing

Extended NAICS 332999-12 companies 14companies

Cognitive Disability Information Centers

Parent: All Other Miscellaneous Ambulatory Health Care Services

Extended NAICS 621999-36 companies 122companies

Fishing Lake Management

Parent: Hunting and Trapping

Extended NAICS 114210-02 companies 20companies

Duct & Duct Fittings (Manufacturing)

Parent: Sheet Metal Work Manufacturing

Extended NAICS 332322-02 companies 68companies

Shoe Fillers (Manufacturing)

Parent: Other Leather and Allied Product Manufacturing

Extended NAICS 316990-25 companies —

Pallets & Skids (Manufacturing)

Parent: Wood Container and Pallet Manufacturing

Extended NAICS 321920-08 companies 496companies

Bedding (Manufacturing) Supplies (Manufacturing)

Parent: Mattress Manufacturing

Extended NAICS 337910-03 companies 8companies

Orthopedic Prosthetic/Srgcl Appl (Manufacturing)

Parent: Surgical Appliance and Supplies Manufacturing

Extended NAICS 339113-12 companies 110companies

Shoes-Orthopedic (Manufacturing)

Parent: Surgical Appliance and Supplies Manufacturing

Extended NAICS 339113-16 companies —

Orthotics

Parent: Offices of All Other Miscellaneous Health Practitioners

Extended NAICS 621399-29 companies 149companies

Marine Electric Service

Parent: Electronic and Precision Equipment Repair and Maintenance

Extended NAICS 811210-50 companies 51companies

Computer Applications Retail (Wholesale) Distr

Parent: Electronics and Appliance Retailers

Extended NAICS 449210-85 companies 6companies

Computer Software (Wholesale)

Parent: Computer and Computer Peripheral Equipment and Software Merchant Wholesalers

Extended NAICS 423430-01 companies 112companies

Communications Contractors

Parent: Electrical Contractors and Other Wiring Installation Contractors

Extended NAICS 238210-02 companies 62companies

Steam Fitters

Parent: Plumbing, Heating, and Air-Conditioning Contractors

Extended NAICS 238220-34 companies 1companies

Hog Equipment (Manufacturing)

Parent: Farm Machinery and Equipment Manufacturing

Extended NAICS 333111-10 companies 36companies

Facilities Management

Parent: Facilities Support Services

Extended NAICS 561210-03 companies 326companies

Hardware Consultants

Parent: Computer Systems Design Services

Extended NAICS 541512-14 companies 40companies

Internet Services-Network Designers/Conslnt

Parent: Computer Systems Design Services

Extended NAICS 541512-19 companies 776companies

Computers-Virtual Reality

Parent: Computer Systems Design Services

Extended NAICS 541512-08 companies 127companies

Computer Disaster Planning

Parent: Computer Systems Design Services

Extended NAICS 541512-03 companies 69companies

Information Management

Parent: Computer Systems Design Services

Extended NAICS 541512-05 companies 67companies

Computers-Multimedia

Parent: Computer Systems Design Services

Extended NAICS 541512-07 companies 74companies

Electronic Data Interchange

Parent: Computer Systems Design Services

Extended NAICS 541512-11 companies 25companies

Website Design Service

Parent: Computer Systems Design Services

Extended NAICS 541512-17 companies 7,909companies

Computers-Telephony

Parent: Computer Systems Design Services

Extended NAICS 541512-20 companies 23companies

Consultants Usability

Parent: Computer Systems Design Services

Extended NAICS 541512-24 companies 2companies

Veterans & Military Information Services

Parent: Administration of Veterans' Affairs

Extended NAICS 923140-05 companies 201companies

Moss Control

Parent: Support Activities for Forestry

Extended NAICS 115310-06 companies 3companies

Federal Govt-Veterans Affairs Admin

Parent: Administration of Veterans' Affairs

Extended NAICS 923140-03 companies —

Ranges & Stoves-Dealers (Retail)

Parent: Electronics and Appliance Retailers

Extended NAICS 449210-19 companies 38companies

Dental Implants-Prosthesis (Manufacturing)

Parent: Dental Laboratories

Extended NAICS 339116-05 companies 616companies

Refugee Programs-Resettlement/Health Service

Parent: Emergency and Other Relief Services

Extended NAICS 624230-02 companies 27companies

Employment Service-Handicapped & Disabled

Parent: Vocational Rehabilitation Services

Extended NAICS 624310-05 companies 16companies

Microprocessors (Manufacturing)

Parent: Semiconductor and Related Device Manufacturing

Extended NAICS 334413-01 companies 6companies

Dormer Construction

Parent: Residential Remodelers

Extended NAICS 236118-10 companies 1companies

Joiners

Parent: Finish Carpentry Contractors

Extended NAICS 238350-16 companies 1companies

Circuit Board Assembly & Repairs (Manufacturing)

Parent: Bare Printed Circuit Board Manufacturing

Extended NAICS 334412-01 companies 30companies

Fire Protection Engineers

Parent: Marketing Consulting Services

Extended NAICS 541613-09 companies 9companies

Semiconductor Devices (Wholesale)

Parent: Other Electronic Parts and Equipment Merchant Wholesalers

Extended NAICS 423690-36 companies 52companies

Electronic Parts Assemblers (Wholesale)

Parent: Electrical Apparatus and Equipment, Wiring Supplies, and Related Equipment Merchant Wholesalers

Extended NAICS 423610-29 companies 111companies

Wrecker Bodies & Equipment

Parent: Site Preparation Contractors

Extended NAICS 238910-17 companies 1companies

Bar Code Scanning Equipment & Supplies (Wholesale)

Parent: Office Equipment Merchant Wholesalers

Extended NAICS 423420-06 companies 118companies

Television Broadband Digital (Manufacturing)

Parent: Audio and Video Equipment Manufacturing

Extended NAICS 334310-17 companies 8companies

Ceilings

Parent: Roofing Contractors

Extended NAICS 238160-01 companies 284companies

Automobile Wreckers (Manufacturing)

Parent: Motor Vehicle Body Manufacturing

Extended NAICS 336211-01 companies 90companies

Communications Services-Common Carriers

Parent: All Other Telecommunications

Extended NAICS 517810-03 companies 934companies

Television & Radio (Manufacturing)

Parent: Audio and Video Equipment Manufacturing

Extended NAICS 334310-13 companies 4companies

Agricultural Consultants

Parent: Other Scientific and Technical Consulting Services

Extended NAICS 541690-10 companies 705companies

Bowling Apparel & Accessories (Retail)

Parent: Sporting Goods Retailers

Extended NAICS 459110-09 companies 413companies

Piping-Process & Industrial

Parent: Plumbing, Heating, and Air-Conditioning Contractors

Extended NAICS 238220-48 companies 21companies

Ergonomics

Parent: Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)

Extended NAICS 541715-13 companies 83companies

Pipe Bending & Fabricating (Manufacturing)

Parent: Fabricated Pipe and Pipe Fitting Manufacturing

Extended NAICS 332996-02 companies 52companies

Health Care Products (Retail)

Parent: Pharmacies and Drug Retailers

Extended NAICS 456110-06 companies 463companies

Developmentally Disabled Info Services

Parent: Vocational Rehabilitation Services

Extended NAICS 624310-03 companies 203companies

Air Duct Sealing

Parent: Plumbing, Heating, and Air-Conditioning Contractors

Extended NAICS 238220-49 companies 37companies

Pipe-Cast Iron (Wholesale)

Parent: Metal Service Centers and Other Metal Merchant Wholesalers

Extended NAICS 423510-51 companies 4companies

Wire & Cable-Electric (Wholesale)

Parent: Electrical Apparatus and Equipment, Wiring Supplies, and Related Equipment Merchant Wholesalers

Extended NAICS 423610-85 companies 164companies

Pipe Fittings (Wholesale)

Parent: Industrial Supplies Merchant Wholesalers

Extended NAICS 423840-49 companies 73companies

Loans-Agricultural

Parent: International, Secondary Market, and All Other Nondepository Credit Intermediation

Extended NAICS 522299-12 companies 252companies

Automobile Bumpers Guards & Grills (Wholesale)

Parent: Motor Vehicle Supplies and New Parts Merchant Wholesalers

Extended NAICS 423120-07 companies 1companies

Shoes-Dance (Retail)

Parent: Shoe Retailers

Extended NAICS 458210-11 companies 11companies

Bowling Instruction

Parent: Sports and Recreation Instruction

Extended NAICS 611620-05 companies 15companies

Clay Ceramic & Refractory Minerals NEC

Parent: Kaolin, Clay, and Ceramic and Refractory Minerals Mining

Extended NAICS 212323-04 companies 10companies

Welding & Steel Fabrication

Parent: Site Preparation Contractors

Extended NAICS 238910-57 companies 1,538companies

Labels-Paper (Manufacturing)

Parent: Paper Bag and Coated and Treated Paper Manufacturing

Extended NAICS 322220-06 companies 187companies

Ironworking Machinery (Manufacturing)

Parent: Saw Blade and Handtool Manufacturing

Extended NAICS 332216-16 companies 1companies

Welding Assemblies & Stamping (Manufacturing)

Parent: Fabricated Structural Metal Manufacturing

Extended NAICS 332312-12 companies 1companies

Hospital Equipment & Supplies (Manufacturing)

Parent: Surgical and Medical Instrument Manufacturing

Extended NAICS 339112-01 companies 758companies

Bowling Ball (Manufacturing)

Parent: Sporting and Athletic Goods Manufacturing

Extended NAICS 339920-05 companies 5companies

Shells-Marine (Manufacturing)

Parent: All Other Miscellaneous Manufacturing

Extended NAICS 339999-53 companies 16companies

Ceramic Equipment ment & Supplies (Wholesale)

Parent: Toy and Hobby Goods and Supplies Merchant Wholesalers

Extended NAICS 423920-04 companies 7companies

Forest Land

Parent: Nature Parks and Other Similar Institutions

Extended NAICS 712190-08 companies 5companies

Libraries-Institutional

Parent: Libraries and Archives

Extended NAICS 519210-05 companies 1,147companies

Engineers-Technology

Parent: Engineering Services

Extended NAICS 541330-88 companies 116companies

Engineers-Computer

Parent: Engineering Services

Extended NAICS 541330-82 companies 15companies

Computers-Programming Instruction

Parent: Computer Training

Extended NAICS 611420-02 companies 232companies

Computer Software (Manufacturing)

Parent: Software Publishers

Extended NAICS 513210-01 companies 451companies

Computer Software

Parent: Software Publishers

Extended NAICS 513210-05 companies —

Programming

Parent: Custom Computer Programming Services

Extended NAICS 541511-07 companies 3,663companies

Computers Hard Drive Destruction

Parent: Computer Systems Design Services

Extended NAICS 541512-25 companies 8companies

Rails & Accessories (Manufacturers)

Parent: Other Aluminum Rolling, Drawing, and Extruding

Extended NAICS 331318-05 companies 17companies

Rfid (Radio Frequency Identification)

Parent: Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services

Extended NAICS 518210-27 companies 11companies

Coil Tubing (Manufacturers)

Parent: All Other Petroleum and Coal Products Manufacturing

Extended NAICS 324199-02 companies 7companies

Religious Counseling

Parent: Religious Organizations

Extended NAICS 813110-20 companies 134companies

Mosquito Abatement

Parent: Exterminating and Pest Control Services

Extended NAICS 561710-07 companies 498companies

Pest Control

Parent: Exterminating and Pest Control Services

Extended NAICS 561710-09 companies 17,372companies

Spraying-Insect Control

Parent: Exterminating and Pest Control Services

Extended NAICS 561710-11 companies 107companies

Entomologists

Parent: Soil Preparation, Planting, and Cultivating

Extended NAICS 115112-07 companies 12companies

Herbicide Consultants

Parent: Soil Preparation, Planting, and Cultivating

Extended NAICS 115112-09 companies 6companies

Insectaries

Parent: Nature Parks and Other Similar Institutions

Extended NAICS 712190-02 companies 3companies

Organic Farms

Parent: All Other Miscellaneous Crop Farming

Extended NAICS 111998-06 companies 254companies

Insecticides

Parent: Exterminating and Pest Control Services

Extended NAICS 561710-06 companies 39companies

Pest Control Supplies & Equipment (Manufacturing)

Parent: Pesticide and Other Agricultural Chemical Manufacturing

Extended NAICS 325320-08 companies 43companies

Animals-Pest Trappers

Parent: Exterminating and Pest Control Services

Extended NAICS 561710-01 companies 232companies

Spraying-Horticultural

Parent: Landscaping Services

Extended NAICS 561730-20 companies 20companies

Aquaculture

Parent: Other Aquaculture

Extended NAICS 112519-01 companies 125companies

Insecticides (Manufacturing)

Parent: Pesticide and Other Agricultural Chemical Manufacturing

Extended NAICS 325320-05 companies 8companies

Pesticides & Ag Chemicals NEC (Manufacturing)

Parent: Pesticide and Other Agricultural Chemical Manufacturing

Extended NAICS 325320-09 companies 112companies

Static Controls (Manufacturing)

Parent: Automatic Environmental Control Manufacturing for Residential, Commercial, and Appliance Use

Extended NAICS 334512-05 companies 15companies

Truck Sleepers (Manufacturing)

Parent: Motor Vehicle Body Manufacturing

Extended NAICS 336211-05 companies 3companies

Agricultural Chemicals (Wholesale)

Parent: Farm Supplies Merchant Wholesalers

Extended NAICS 424910-01 companies 252companies

Ornamental Shrub & Tree Services

Parent: Landscaping Services

Extended NAICS 561730-15 companies 90companies

Apple Growers

Parent: Apple Orchards

Extended NAICS 111331-01 companies 38companies

Chemicals-Spraying

Parent: Soil Preparation, Planting, and Cultivating

Extended NAICS 115112-02 companies 13companies

Orchard Service

Parent: Soil Preparation, Planting, and Cultivating

Extended NAICS 115112-13 companies 3companies

Weed Control Service

Parent: Soil Preparation, Planting, and Cultivating

Extended NAICS 115112-16 companies 334companies

Grain Fumigation

Parent: Postharvest Crop Activities (except Cotton Ginning)

Extended NAICS 115114-16 companies 2companies

Oil Companies

Parent: Crude Petroleum Extraction 

Extended NAICS 211120-04 companies 223companies

Termite Damage Restoration

Parent: Residential Remodelers

Extended NAICS 236118-33 companies 218companies

Herbicides (Manufacturing)

Parent: Pesticide and Other Agricultural Chemical Manufacturing

Extended NAICS 325320-04 companies 9companies

Insect Control Devices (Manufacturing)

Parent: Other Fabricated Wire Product Manufacturing

Extended NAICS 332618-08 companies 1companies

Radio Supplies & Parts (Manufacturing)

Parent: Audio and Video Equipment Manufacturing

Extended NAICS 334310-07 companies 4companies

Insecticides (Wholesale)

Parent: Farm Supplies Merchant Wholesalers

Extended NAICS 424910-21 companies —

Tree Consultants

Parent: Landscape Architectural Services

Extended NAICS 541320-07 companies 51companies

Bee Removal

Parent: Exterminating and Pest Control Services

Extended NAICS 561710-02 companies 172companies

Fungicides

Parent: Exterminating and Pest Control Services

Extended NAICS 561710-04 companies 4companies

Insect Screens

Parent: Exterminating and Pest Control Services

Extended NAICS 561710-12 companies 2companies

Bats-Removal & Exclusion

Parent: Janitorial Services

Extended NAICS 561720-05 companies 9companies

Arborists

Parent: Landscaping Services

Extended NAICS 561730-02 companies 285companies

Tree Trimming

Parent: Landscaping Services

Extended NAICS 561730-28 companies 725companies

Right Of Way Maintenance Services

Parent: Landscaping Services

Extended NAICS 561730-29 companies 5companies

Seeds & Bulbs (Wholesale)

Parent: Farm Supplies Merchant Wholesalers

Extended NAICS 424910-27 companies 868companies

Concrete Reinforcements (Manufacturing)

Parent: Fabricated Structural Metal Manufacturing

Extended NAICS 332312-03 companies 55companies

Video Equipment (Wholesale)

Parent: Household Appliances, Electric Housewares, and Consumer Electronics Merchant Wholesalers

Extended NAICS 423620-36 companies 9companies

Toilet Partitions (Retail)

Parent: Hardware Retailers

Extended NAICS 444140-12 companies 13companies

Trunks-Dealers (Retail)

Parent: Luggage and Leather Goods Retailers

Extended NAICS 458320-09 companies 6companies

Photo-Modeling Studios

Parent: Commercial Photography

Extended NAICS 541922-01 companies 8companies

Orthopedic Surgeons

Parent: Offices of Physicians (except Mental Health Specialists)

Extended NAICS 621111-19 companies 2,286companies

Mechanotherapists Dm

Parent: All Other Miscellaneous Ambulatory Health Care Services

Extended NAICS 621999-29 companies 41companies

State Government-Libraries

Parent: Libraries and Archives

Extended NAICS 519210-10 companies 57companies

Library Networks

Parent: Libraries and Archives

Extended NAICS 519210-07 companies 537companies

Federal Government-Libraries

Parent: Libraries and Archives

Extended NAICS 519210-03 companies 100companies

Other classifications

Search "integrated-support-systems" in SIC 6-Digit codes →

Sources & methodology

NAICS definitions: U.S. Census Bureau, 2022

SIC definitions: OSHA SIC Manual

Classification methodology →

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