- Ice
- Ice Cream & Frozen Dessert Manufacturers & Wholesalers
- Ice Cream & Frozen Dessert Stores
- Ice Cream Cones
- Ice Cream Freezers
- Ice Cream Making Equipment
- Ice Skating Equipment & Supplies
- Ice Skating Rinks
- Ice-Making Machines & Equipment
- Identification Cards
- Identification Equipment & Supplies
- Illustrators
- Image Consultants
- Imaging Scanning Systems & Service
- Immigration Lawyers
- Importers
- Imprinting
- Incense
- Incinerators
- Incorporating Companies
- Indian Restaurants
- Indoor Advertising
- Indoor Golf
- Indoor Plant Maintenance & Wholesalers
- Indoor Plant Stores
- Industrial & Commercial Fans
- Industrial & Commercial Garbage Disposal Equipment
- Industrial & Commercial Photographers
- Industrial & Commercial Waste Compactors
- Industrial Consultants
- Industrial Crating & Crates
- Industrial Designers
- Industrial Diamonds
- Industrial Doors
- Industrial Drying Equipment
- Industrial Engineers
- Industrial Equipment & Supplies
- Industrial Fasteners
- Industrial Food Service
- Industrial Hearing & Sound Level Testing
- Industrial Inspection Devices
- Industrial Ovens
- Industrial Parks
- Industrial Sewing Machines
- Industrial Silencers
- Industrial Steam Cleaning
- Industrial Trailers
- Industrial Vacuum Cleaners
- Industrial Vibrators
- Industrial Waste Disposal & Reduction Equipment
- Industrial Waste Disposal & Reduction Service
- Industrial X-Ray Laboratories
- Information Services
- Information System Consultants
- Inks
- Inns
- Insolvency Consultants
- Inspection Services
- Institutional Food Service
- Instruction Consultants
- Instrumentation Engineers
- Instrumentation Services
- Insulation Consultants
- Insurance
- Insurance Agents
- Insurance Agents & Brokers
- Insurance Brokers
- Insurance Claim Adjusters
- Insurance Company Rating Bureaus
- Insurance Consultants
- Insurance Medical Exams
- Integrated Health & Social Service Centres (CISSS)
- Interior Decorators
- Interior Designers
- Interlocking Stone
- International Development
- Internet Broadcasting
- Internet Cafes
- Internet Consultants
- Internet Product & Service Providers
- Introduction & Dating Services
- Inventors
- Inventory Service
- Investigators
- Investment Advisory Services
- Investment Dealers
- Invitations & Announcements
- Iron Works
- Irrigation Systems & Equipment
- Italian Restaurants