In the U.S. Cluster Mapping project there are 316 Subclusters, as shown below.
Aircraft (C1-1 Aerospace Vehicles & Defense)
Missiles & Space Vehicles (C1-2 Aerospace Vehicles & Defense)
Search & Navigation Equipment (C1-3 Aerospace Vehicles & Defense)
Agricultural Services (C2-1 Agricultural Inputs & Services)
Farm Management & Labor Services (C2-2 Agricultural Inputs & Services)
Fertilizers (C2-3 Agricultural Inputs & Services)
Accessories & Specialty Apparel (C3-1 Apparel)
Men’s Clothing (C3-2 Apparel)
Women’s Clothing (C3-3 Apparel)
Apparel Contractors (C3-4 Apparel)
Automotive Parts (C4-1 Automotive)
Gasoline Engines & Engine Parts (C4-2 Automotive)
Motor Vehicles (C4-3 Automotive)
Small Vehicles (C4-4 Automotive)
Military Vehicles & Tanks (C4-5 Automotive)
Metal Mills & Foundries (C4-6 Automotive)
Biopharmaceutical Products (C5-1 Biopharmaceuticals)
Biological Products (C5-2 Biopharmaceuticals)
Diagnostic Substances (C5-3 Biopharmaceuticals)
Corporate Headquarters (C6-1 Business Services)
Consulting Services (C6-2 Business Services)
Business Support Services (C6-3 Business Services)
Computer Services (C6-4 Business Services)
Employment Placement Services (C6-5 Business Services)
Engineering Services (C6-6 Business Services)
Architectural & Drafting Services (C6-7 Business Services)
Ground Passenger Transportation (C6-8 Business Services)
Coal Mining (C7-1 Coal Mining)
Communications Services (C8-1 Communications Equipment & Services)
Communications Equipment (C8-2 Communications Equipment & Services)
Communications Equipment Components (C8-3 Communications Equipment & Services)
Construction (C9-1 Construction Products & Services)
Water, Sewage, & Other Systems (C9-2 Construction Products & Services)
Construction Products (C9-3 Construction Products & Services)
Construction Components (C9-4 Construction Products & Services)
Construction Materials (C9-5 Construction Products & Services)
Warehousing & Storage (C10-1 Distribution & Electronic Commerce)
Electronic & Catalog Shopping (C10-2 Distribution & Electronic Commerce)
Wholesale Trade Agents & Brokers (C10-3 Distribution & Electronic Commerce)
Support Services (C10-4 Distribution & Electronic Commerce)
Wholesale of Apparel & Accessories (C10-5 Distribution & Electronic Commerce)
Wholesale of Books, Periodicals, & Newspapers (C10-6 Distribution & Electronic Commerce)
Wholesale of Chemical & Allied Products (C10-7 Distribution & Electronic Commerce)
Wholesale of Drugs & Druggists’ Sundries (C10-8 Distribution & Electronic Commerce)
Wholesale of Farm Products & Supplies (C10-9 Distribution & Electronic Commerce)
Wholesale of Food Products (C10-10 Distribution & Electronic Commerce)
Wholesale of Furniture & Home Furnishing (C10-11 Distribution & Electronic Commerce)
Wholesale of Jewelry, Watches, Precious Stones, & Precious Metals (C10-12 Distribution & Electronic Commerce)
Wholesale of Paper & Paper Products (C10-13 Distribution & Electronic Commerce)
Wholesale of Sporting & Recreational Goods & Supplies (C10-14 Distribution & Electronic Commerce)
Wholesale of Toy & Hobby Goods & Supplies (C10-15 Distribution & Electronic Commerce)
Wholesale of Other Merchandise (C10-16 Distribution & Electronic Commerce)
Wholesale of Farm & Garden Machinery & Equipment (C10-17 Distribution & Electronic Commerce)
Wholesale of Construction & Mining Machinery & Equipment (C10-18 Distribution & Electronic Commerce)
Wholesale of Industrial Machinery, Equipment, & Supplies (C10-19 Distribution & Electronic Commerce)
Wholesale of Service Establishment Equipment, & Supplies (C10-20 Distribution & Electronic Commerce)
Wholesale of Transportation Equipment & Supplies (except Motor Vehicles) (C10-21 Distribution & Electronic Commerce)
Wholesale of Professional & Commercial Equipment & Supplies (C10-22 Distribution & Electronic Commerce)
Wholesale of Electrical & Electronic Goods (C10-23 Distribution & Electronic Commerce)
Wholesale of Metals & Minerals (except Petroleum) (C10-24 Distribution & Electronic Commerce)
Wholesale of Petroleum & Petroleum Products (C10-25 Distribution & Electronic Commerce)
Rental & Leasing (C10-26 Distribution & Electronic Commerce)
Personal Care & Cleaning Products (C11-1 Downstream Chemical Products)
Processed Chemical Products (C11-2 Downstream Chemical Products)
Dyes, Pigments & Coating (C11-3 Downstream Chemical Products)
Explosives (C11-4 Downstream Chemical Products)
Lubricating Oils & Greases (C11-5 Downstream Chemical Products)
Metal Products (C12-1 Downstream Metal Products)
Ammunition (C12-2 Downstream Metal Products)
Fabricated Metal Structures (C12-3 Downstream Metal Products)
Metal Containers (C12-4 Downstream Metal Products)
Training Programs (C13-1 Education & Knowledge Creation)
Colleges, Universities, & Professional Schools (C13-2 Education & Knowledge Creation)
Educational Support Services (C13-3 Education & Knowledge Creation)
Research Organizations (C13-4 Education & Knowledge Creation)
Professional Organizations (C13-5 Education & Knowledge Creation)
Fossil Fuel Electric Power (C14-1 Electric Power Generation & Transmission)
Alternative Electric Power (C14-2 Electric Power Generation & Transmission)
Electric Power Transmission (C14-3 Electric Power Generation & Transmission)
Waste Collection (C15-1 Environmental Services)
Waste Processing (C15-2 Environmental Services)
Other Waste Management Services (C15-3 Environmental Services)
Financial Investment Activities (C16-1 Financial Services)
Credit Intermediation (C16-2 Financial Services)
Credit Bureaus (C16-3 Financial Services)
Monetary Authorities – Central Bank (C16-4 Financial Services)
Securities Brokers, Dealers, & Exchanges (C16-5 Financial Services)
Fishing & Fishing Products (C17-1 Fishing & Fishing Products)
Specialty Foods & Ingredients (C18-1 Food Processing & Manufacturing)
Baked Goods (C18-2 Food Processing & Manufacturing)
Candy & Chocolate (C18-3 Food Processing & Manufacturing)
Coffee & Tea (C18-4 Food Processing & Manufacturing)
Packaged Fruit & Vegetables (C18-5 Food Processing & Manufacturing)
Dairy Products (C18-6 Food Processing & Manufacturing)
Animal Foods (C18-7 Food Processing & Manufacturing)
Soft Drinks & Ice (C18-8 Food Processing & Manufacturing)
Malt Beverages (C18-9 Food Processing & Manufacturing)
Distilleries (C18-10 Food Processing & Manufacturing)
Wineries (C18-11 Food Processing & Manufacturing)
Milling & Refining of Cereals & Oilseeds (C18-12 Food Processing & Manufacturing)
Milling & Refining of Sugar (C18-13 Food Processing & Manufacturing)
Farm Wholesalers (C18-14 Food Processing & Manufacturing)
Glass Containers (C18-15 Food Processing & Manufacturing)
Footwear (C19-1 Footwear)
Footwear Components (C19-2 Footwear)
Forestry (C20-1 Forestry)
Household Furniture (C21-1 Furniture)
Institutional Furniture (C21-2 Furniture)
Office Furniture (C21-3 Furniture)
Wood Cabinets & Woodwork (C21-4 Furniture)
Mobile Homes (C21-5 Furniture)
Spectator Sports (C22-1 Hospitality & Tourism)
Amusement Parks & Arcades (C22-2 Hospitality & Tourism)
Cultural & Educational Entertainment (C22-3 Hospitality & Tourism)
Gambling Facilities (C22-4 Hospitality & Tourism)
Other Tourism Attractions (C22-5 Hospitality & Tourism)
Accommodations & Related Services (C22-6 Hospitality & Tourism)
Tourism Related Services (C22-7 Hospitality & Tourism)
Electronic Components (C23-1 Information Technology & Analytical Instruments)
Computers & Peripherals (C23-2 Information Technology & Analytical Instruments)
Semiconductors (C23-3 Information Technology & Analytical Instruments)
Software Publishers (C23-4 Information Technology & Analytical Instruments)
Software Reproducing (C23-5 Information Technology & Analytical Instruments)
Process & Laboratory Instruments (C23-6 Information Technology & Analytical Instruments)
Medical Apparatus (C23-7 Information Technology & Analytical Instruments)
Audio & Video Equipment (C23-8 Information Technology & Analytical Instruments)
Insurance Related Services (C24-1 Insurance Services)
Insurance Carriers (C24-2 Insurance Services)
Reinsurance Carriers (C24-3 Insurance Services)
Jewelry & Precious Metals Products (C25-1 Jewelry & Precious Metals)
Personal Leather Goods & Luggage (C26-1 Leather & Related Products)
Women’s Handbags & Purses (C26-2 Leather & Related Products)
Textile Bags & Canvas Products (C26-3 Leather & Related Products)
Lighting Fixtures & Parts (C27-1 Lighting & Electrical Equipment)
Electrical Equipment (C27-2 Lighting & Electrical Equipment)
Electrical Components (C27-3 Lighting & Electrical Equipment)
Storage Batteries (C27-4 Lighting & Electrical Equipment)
Meat Processing (C28-1 Livestock Processing)
Livestock Merchant Wholesalers (C28-2 Livestock Processing)
Advertising Related Services (C29-1 Marketing, Design, & Publishing)
Other Marketing Related Services (C29-2 Marketing, Design, & Publishing)
Design Services (C29-3 Marketing, Design, & Publishing)
Publishing (C29-4 Marketing, Design, & Publishing)
Optical Instruments & Ophthalmic Goods (C30-1 Medical Devices)
Surgical & Dental Instruments & Supplies (C30-2 Medical Devices)
Metal Mining (C31-1 Metal Mining)
Metalworking Machinery (C32-1 Metalworking Technology)
Machine Tools & Accessories (C32-2 Metalworking Technology)
Hand Tools (C32-3 Metalworking Technology)
Fasteners (C32-4 Metalworking Technology)
Metal Processing (C32-5 Metalworking Technology)
Music & Sound Recording (C33-1 Music & Sound Recording)
Nonmetal Mining (C34-1 Nonmetal Mining)
Petroleum Processing (C35-1 Oil & Gas Production & Transportation)
Support Activities for Oil & Gas Operations (C35-2 Oil & Gas Production & Transportation)
Drilling Wells (C35-3 Oil & Gas Production & Transportation)
Oil & Gas Extraction (C35-4 Oil & Gas Production & Transportation)
Oil & Gas Machinery (C35-5 Oil & Gas Production & Transportation)
Pipeline Transportation (C35-6 Oil & Gas Production & Transportation)
Paper Mills (C36-1 Paper & Packaging)
Packaging (C36-2 Paper & Packaging)
Paper Products (C36-3 Paper & Packaging)
Performing Artists (C37-1 Performing Arts)
Promoters & Managers (C37-2 Performing Arts)
Plastic Products (C38-1 Plastics)
Plastic Materials & Resins (C38-2 Plastics)
Printing Inputs (C39-1 Printing Services)
Support Activities for Printing (C39-2 Printing Services)
Printing Services (C39-3 Printing Services)
Greeting Card Printing & Publishing (C39-4 Printing Services)
Industrial Machinery (C40-1 Production Technology & Heavy Machinery)
Agricultural & Construction Machinery & Components (C40-2 Production Technology & Heavy Machinery)
Air Handling Equipment (C40-3 Production Technology & Heavy Machinery)
Commercial & Service Industry Machinery (C40-4 Production Technology & Heavy Machinery)
Moving & Material Handling Equipment (C40-5 Production Technology & Heavy Machinery)
Process Equipment & Components (C40-6 Production Technology & Heavy Machinery)
Recreational & Decorative Goods (C41-1 Recreational & Small Electric Goods)
Games, Toys, & Children’s Vehicles (C41-2 Recreational & Small Electric Goods)
Motorcycles & Bicycles (C41-3 Recreational & Small Electric Goods)
Sporting & Athletic Goods (C41-4 Recreational & Small Electric Goods)
Office Supplies (C41-5 Recreational & Small Electric Goods)
Electric Housewares (C41-6 Recreational & Small Electric Goods)
Yarn & Thread Mills (C42-1 Textile Manufacturing)
Fabric Mills (C42-2 Textile Manufacturing)
Textile & Fabric Finishing (C42-3 Textile Manufacturing)
Knitting Mills (C42-4 Textile Manufacturing)
Household Textile Products (C42-5 Textile Manufacturing)
Other Textile Products (C42-6 Textile Manufacturing)
Fibers (C42-7 Textile Manufacturing)
Tobacco (C43-1 Tobacco)
Trailers & Motor Homes (C44-1 Trailers, Motor Homes, & Appliances)
Burial Caskets (C44-2 Trailers, Motor Homes, & Appliances)
Household Appliances (C44-3 Trailers, Motor Homes, & Appliances)
Air Transportation (C45-1 Transportation & Logistics)
Specialty Air Transportation (C45-2 Transportation & Logistics)
Ground Transportation Support Activities (C45-3 Transportation & Logistics)
Trucking (C45-4 Transportation & Logistics)
Bus Transportation (C45-5 Transportation & Logistics)
Organic Chemicals (C46-1 Upstream Chemical Products)
Inorganic Chemicals (C46-2 Upstream Chemical Products)
Industrial Gas (C46-3 Upstream Chemical Products)
Agricultural Chemicals (C46-4 Upstream Chemical Products)
Iron & Steel Mills & Forging (C47-1 Upstream Metal Manufacturing)
Metal Processing (C47-2 Upstream Metal Manufacturing)
Metal Products (C47-3 Upstream Metal Manufacturing)
Wires & Springs (C47-4 Upstream Metal Manufacturing)
Video Production & Distribution (C48-1 Video Production & Distribution)
Clay Products & Refractories (C49-1 Vulcanized & Fired Materials)
Glass Products (C49-2 Vulcanized & Fired Materials)
Rubber Products (C49-3 Vulcanized & Fired Materials)
Water Passenger Transportation (C50-1 Water Transportation)
Marine Transportation Services (C50-2 Water Transportation)
Boat Building & Repairing (C50-3 Water Transportation)
Wood Processing (C51-1 Wood Products)
Wood Components & Products (C51-2 Wood Products)
Prefabricated Wood Building (C51-3 Wood Products)
Food Wholesaling (C101-1 Local Food & Beverage Processing & Distribution)
Commercial & Retail Bakeries (C101-2 Local Food & Beverage Processing & Distribution)
Retail Food Stores (C101-3 Local Food & Beverage Processing & Distribution)
Tobacco Retailing (C101-4 Local Food & Beverage Processing & Distribution)
Beer & Liquor Wholesaling (C101-5 Local Food & Beverage Processing & Distribution)
Beer, Wine, & Liquor Retailing (C101-6 Local Food & Beverage Processing & Distribution)
Vending & Direct Selling (C101-7 Local Food & Beverage Processing & Distribution)
Cleaning Services (C102-1 Local Personal Services (Non-Medical))
Hair Care Services (C102-2 Local Personal Services (Non-Medical))
Photographic & Photofinishing Services (C102-3 Local Personal Services (Non-Medical))
Repair Services (C102-4 Local Personal Services (Non-Medical))
Child Care Services (C102-5 Local Personal Services (Non-Medical))
Other Personal Services (C102-6 Local Personal Services (Non-Medical))
Personal Products Retailing (C102-7 Local Personal Services (Non-Medical))
Healthcare Provider Offices (C103-1 Local Health Services)
Hospitals (C103-2 Local Health Services)
Medical Laboratories (C103-3 Local Health Services)
Home & Residential Care (C103-4 Local Health Services)
Funeral Service & Crematories (C103-5 Local Health Services)
Medical Equipment Distribution & Rental (C103-6 Local Health Services)
Drug Stores (C103-7 Local Health Services)
Optical Goods Retailing (C103-8 Local Health Services)
Communications Services (C104-1 Local Utilities)
Electric Power Distribution (C104-2 Local Utilities)
Natural Gas Distribution (C104-3 Local Utilities)
Heating Oil & Other Fuel Dealers (C104-4 Local Utilities)
Sanitary Services (C104-5 Local Utilities)
Local Passenger Transportation (C105-1 Local Logistical Services)
Local Transportation Services (C105-2 Local Logistical Services)
Warehousing Services (C105-3 Local Logistical Services)
Truck Leasing (C105-4 Local Logistical Services)
Passenger Car Rental (C105-5 Local Logistical Services)
Landscape & Horticultural Services (C106-1 Local Household Goods & Services)
Electronics Repair (C106-2 Local Household Goods & Services)
Appliance Retailing (C106-3 Local Household Goods & Services)
Hardware Wholesaling (C106-4 Local Household Goods & Services)
Hardware Retailing (C106-5 Local Household Goods & Services)
Gardening Products & Supplies Retailing (C106-6 Local Household Goods & Services)
Furniture & Homefurnishings Retailing (C106-7 Local Household Goods & Services)
Deposit-taking Institutions (C107-1 Local Financial Services)
Pension, Health, & Welfare Funds (C107-2 Local Financial Services)
Insurance Agents & Brokers (C107-3 Local Financial Services)
Tax Return Preparation Services (C107-4 Local Financial Services)
Collection Agencies (C107-5 Local Financial Services)
Automotive Wholesaling (C108-1 Local Motor Vehicle Products & Services)
Automobile Dealers (C108-2 Local Motor Vehicle Products & Services)
Other Motor Vehicles Distribution (C108-3 Local Motor Vehicle Products & Services)
Automotive Repair Shops (C108-4 Local Motor Vehicle Products & Services)
Gasoline Stations (C108-5 Local Motor Vehicle Products & Services)
Parking Services (C108-6 Local Motor Vehicle Products & Services)
Other Automotive Services (C108-7 Local Motor Vehicle Products & Services)
Automotive Parts Wholesaling (C108-8 Local Motor Vehicle Products & Services)
Automotive Parts Retailing (C108-9 Local Motor Vehicle Products & Services)
Apparel Retailing (C109-1 Local Retailing of Clothing & General Merchandise)
Jewelry Retailing (C109-2 Local Retailing of Clothing & General Merchandise)
General Merchandise Retailing (C109-3 Local Retailing of Clothing & General Merchandise)
Sewing, Needlework, & Piece Goods Retailing (C109-4 Local Retailing of Clothing & General Merchandise)
Luggage Retailing (C109-5 Local Retailing of Clothing & General Merchandise)
Newspapers (C110-1 Local Entertainment & Media)
Electronic Media (C110-2 Local Entertainment & Media)
Movie Theatres (C110-3 Local Entertainment & Media)
Book & Periodical Retailing (C110-4 Local Entertainment & Media)
Musical Instruments Retailing (C110-5 Local Entertainment & Media)
Sporting & Hobby Retailing (C110-6 Local Entertainment & Media)
Video Rental (C110-7 Local Entertainment & Media)
Electronic & Photographic Retailing (C110-8 Local Entertainment & Media)
Hospitality Establishments (C111-1 Local Hospitality Establishments)
Recreational Facilities & Instruction (C111-2 Local Hospitality Establishments)
Gifts & Souvenirs Retailing (C111-3 Local Hospitality Establishments)
Local Professional Services (C112-1 Local Commercial Services)
Commercial Photography, Printing & Signmaking (C112-2 Local Commercial Services)
Laundry & Linen Services (C112-3 Local Commercial Services)
Building Support Services (C112-4 Local Commercial Services)
Miscellaneous Repair Services (C112-5 Local Commercial Services)
Security Services (C112-6 Local Commercial Services)
Testing Laboratories (C112-7 Local Commercial Services)
Stationery & Office Supply Retailing (C112-8 Local Commercial Services)
Elementary & Secondary Schools (C113-1 Local Education & Training)
Job Training Services (C113-2 Local Education & Training)
Recreational & Other Services (C113-3 Local Education & Training)
Trusts (C114-1 Local Community & Civic Organizations)
Social Service Organizations (C114-2 Local Community & Civic Organizations)
Business Associations (C114-3 Local Community & Civic Organizations)
Labor Organizations (C114-4 Local Community & Civic Organizations)
Political Organizations (C114-5 Local Community & Civic Organizations)
Religious Organizations (C114-6 Local Community & Civic Organizations)
Real Estate Services (C115-1 Local Real Estate, Construction, & Development)
General Contractors (C115-2 Local Real Estate, Construction, & Development)
Developers (C115-3 Local Real Estate, Construction, & Development)
Specialty Contractors (C115-4 Local Real Estate, Construction, & Development)
Highway & Street Construction (C115-5 Local Real Estate, Construction, & Development)
Water & Sewer Line Construction (C115-6 Local Real Estate, Construction, & Development)
Concrete Products (C115-7 Local Real Estate, Construction, & Development)
Construction Materials Wholesaling (C115-8 Local Real Estate, Construction, & Development)
Construction Materials Retailing (C115-9 Local Real Estate, Construction, & Development)
Building Equipment Distribution (C115-10 Local Real Estate, Construction, & Development)
Industrial Repair Services (C116-1 Local Industrial Products & Services)
Industrial Products & Services Wholesaling (C116-2 Local Industrial Products & Services)
Industrial Machinery & Distribution (C116-3 Local Industrial Products & Services)
Miscellaneous Equipment Rental & Leasing (C116-4 Local Industrial Products & Services)