- CD & DVD Duplication
- CLSC
- Cabinet Makers
- Cabinets & Lockers
- Cable TV Providers
- Cabling Equipment & Supplies
- Cafes Terraces
- Caisses Populaires
- Cajun Restaurants
- Cake Making Supplies & Decorations
- Cakes
- Calendars
- Calibration Service
- Call Centres
- Calligraphy & Calligraphers
- Camera & Photo Equipment Stores
- Campgrounds
- Camping Equipment
- Camps
- Can & Bottle Return Depots
- Cancer Information & Support Service
- Candles
- Candy & Chocolate Manufacturing Equipment
- Candy & Confectionery Manufacturers & Wholesalers
- Candy & Confectionery Stores
- Caning
- Canneries
- Canning Equipment & Supplies
- Canoe Trip Outfitters
- Cans
- Canvas Goods
- Caps & Gowns
- Car & Truck Transporting Companies
- Car Air Conditioning Equipment
- Car Alarm Systems
- Car Brake Service
- Car Brokers
- Car Bumpers & Grilles
- Car Consultants
- Car Customizing & Accessories
- Car Detailing
- Car Electrical Services
- Car Fuel Conversion
- Car Insurance
- Car Leasing
- Car Machine Shop Service
- Car Manufacturers
- Car Radiators & Gas Tanks
- Car Radios & Stereo Systems
- Car Remote Starters
- Car Rental
- Car Repair & Service
- Car Upholstery Cleaning
- Car Wash Equipment & Polishing Supplies
- Car Washes
- Car Wrecking & Recycling
- Carbon Dioxide
- Carbon Products
- Carburetors
- Cardboard
- Care Homes
- Career Counselling
- Cargo Surveyors
- Caribbean Restaurants
- Carnival Supplies
- Carnivals
- Carpentry & Carpenters
- Carpet & Rug Cleaning
- Carpet & Rug Cleaning Equipment Rental
- Carpet & Rug Custom Finishing
- Carpet & Rug Manufacturers & Distributors
- Carpet & Rug Rental
- Carpet & Rug Repair
- Carpet & Rug Stores
- Carpet Cleaning Equipment & Supplies
- Carpet Installation Equipment & Supplies
- Carpet Installers
- Carpooling & Car Sharing
- Cartage Hauling & Express Shipping
- Carved & Blown Ornamental Glass
- Casino Organizations
- Casinos
- Cast Stone
- Catalogue & Online Shopping
- Caterers
- Catering Equipment & Supplies
- Caulking Contractors & Caulkers
- Caulking Materials & Equipment
- Ceiling & Wall Cleaning
- Ceilings
- Cement Dealers
- Cement Finishing
- Cement Manufacturers & Wholesalers
- Cemeteries
- Central Vacuum Systems
- Ceramic Tile Dealers
- Ceramic Tile Installers & Contractors
- Ceramic Tile Manufacturers & Distributors
- Ceramics Equipment & Supplies
- Chains
- Chair Manufacturers & Wholesalers
- Chair Rental
- Chalkboards
- Chambers of Commerce
- Charity & Nonprofit Organizations
- Chartered Administrators
- Chartered Appraisers
- Chartered Professional Accountants (CPA)
- Chauffeur Services
- Cheese
- Chemical & Pressure Cleaning Systems
- Chemical & Steam Cleaning Systems
- Chemical Engineers
- Chemical Reclaiming
- Chemical Storage & Handling
- Chemicals
- Cheque Cashing Service
- Child Care Equipment & Supplies
- Childcare Services
- Children's Clothing Stores
- Children's Service & Activity Information
- Chimney Accessories & Materials
- Chimney Building & Repair
- Chimney Cleaning & Sweeping
- Chinese Food Manufacturers & Distributors
- Chinese Food Restaurants
- Chips
- Chiropodists
- Chiropractic Equipment & Supplies
- Chiropractors DC
- Chocolate
- Christmas Decorations & Lights
- Christmas Trees
- Church Supplies & Furnishings
- Churches & Other Places of Worship
- Chutes
- Cider Makers
- Circular & Sample Distribution
- Circus Troupes
- Cisterns
- City Halls
- Civil Engineers
- Cleaners' & Dyers' Equipment & Supplies
- Cleaning & Janitorial Supplies
- Cleaning Compounds
- Clergy
- Clinics
- Clock Repair
- Clocks
- Closed Circuit Television Systems & Equipment (CCTV Systems)
- Closet Organizers & Accessories
- Cloth & Leather Caps
- Cloth Bags
- Clothes Lines
- Clothes Racks & Hangers
- Clothing & Fur Storage
- Clothing Alterations
- Clothing Manufacturers & Wholesalers
- Clothing Stores
- Clowns
- Clubs
- Clutches
- Co-operative Organizations
- Coal & Charcoal
- Coding & Marking Systems & Equipment
- Coffee Break Services & Supplies
- Coffee Machines & Roasting Equipment
- Coffee Shops
- Coffee Stores
- Coffee Wholesalers
- Coin Dealers & Supplies
- Cold & Heat Insulation Contractors
- Cold-Storage Warehouses
- Collectibles
- Collection Agencies
- Colours & Pigments
- Comic Books
- Commercial Artists
- Commercial Carpet Consultants
- Commercial Kitchen Equipment
- Commercial Refrigeration Sales & Services
- Commissioners for Oaths
- Commodity Brokers
- Communication & Transmission Towers
- Communications & Public Relations Consultants
- Community Care & Adult Care Facilities
- Community Service & Charitable Organizations
- Composers & Music Arrangers
- Composters & Composting Services
- Compressors
- Computer & Technology Assistance Programs
- Computer Accessories & Supplies
- Computer Consultants
- Computer Data Processing
- Computer Data Recovery
- Computer Graphics Design & Animation
- Computer Manufacturers & Wholesalers
- Computer Networking
- Computer Renting & Leasing
- Computer Repair & Cleaning
- Computer Security
- Computer Software
- Computer Stores
- Computer Training Courses
- Concert Bureaus
- Concierge & Personal Assistant Services
- Concrete Additives
- Concrete Blocks
- Concrete Breaking
- Concrete Contractors
- Concrete Curing & Treating Materials
- Concrete Cutting & Breaking Equipment
- Concrete Drilling & Sawing
- Concrete Formers
- Concrete Forms & Accessories
- Concrete Inspection
- Concrete Mixers
- Concrete Products
- Concrete Pumping
- Concrete Reinforcements
- Concrete Tanks
- Condos & Townhouses
- Consignment Shops
- Construction Management Consultants
- Construction Materials & Building Supplies
- Construction Surveyors
- Consulates
- Consulting & Analytical Chemists
- Consulting Engineers
- Consumer Protection Services
- Contact Lenses
- Container Freight Service
- Contraception & Contraceptives
- Contractors' Equipment Rental
- Contractors' Equipment Service & Supplies
- Convenience Stores
- Convention & Party Decorators
- Convention Centres & Facilities
- Conveyors
- Cookies
- Cooking Utensils
- Cooling Towers
- Copper
- Coppersmiths
- Copying & Duplicating Service
- Copyright Services
- Cork & Cork Products
- Corporate & Notary Seals
- Correspondence Courses & Schools
- Corrosion Control
- Cosmetic & Plastic Surgery
- Cosmetics & Perfumes Stores
- Cottage Rental
- Counselling Services
- Counter Tops
- Counterfeit Detection Devices
- County Government
- Coupon & Ticket Printing
- Courier Service
- Court & Convention Reporters
- Crane Manufacturers & Distributors
- Crane Parts & Rigging
- Crane Rental & Service
- Crankshaft Grinding
- Credit & Debt Counselling
- Credit Card Protection Services
- Credit Reports
- Credit Unions
- Crematoriums & Cremation Services
- Creperies
- Crests
- Crime Information Service
- Criminal Lawyers
- Cruises
- Crushed Stone
- Crushing & Pulverizing Equipment & Service
- Cryogenic Equipment & Supplies
- Culinary Schools & Cooking Classes
- Culverts
- Curling Equipment & Supplies
- Curtain & Drapery Cleaning
- Curtain & Drapery Fixtures
- Curtain & Drapery Installation Services
- Curtains & Draperies
- Cushion Manufacturers & Wholesalers
- Custom Cases
- Custom Furniture Designers & Builders
- Custom-Designed Machinery
- Custom-Made Shoes
- Customer Relationship Management (CRM)
- Customs Brokers
- Customs Consultants
- Cutting Tools