Ice Cream Manufacturing
2023--Ice Cream--Dried and Ice Cream Substitutes Mfg.
2026--Ice Cream and Ice Cream Products Mfg.

Ice Cream Stands
5812--Eating Places

Indoor Sports
7991--Gymnasiums

Infirmaries
8062--Hospitals--Except Psychiatric

Ink Manufacturing
2893--Printing Ink
2895--Carbon Black

Inns
7011--Hotels and Motels

Insect Exterminators
7342--Exterminating or Fumigating Service

Insecticides Manufacturing
2879--Agricultural Chemicals--NEC (Including Pesticides and Insecticides)

Inspection Bureaus
4785--Inspection Service--Transportation
6411--Insurance Inspection and Investigation Services
7389--Inspection Service--Commodities
7549--Inspection Service--Automotive
9651--Inspection Service--Labor Standards

Insulation Contractors
1742--Insulation Installation--Buildings

Insurance Agents And Brokers (Business Offices)

Insurance Agents And Brokers (Professional Risks)
6411--Insurance Agents and Brokers

Insurance Companies
6311--Life Insurance
6321--Accident and Health Insurance
6324--Hospital and Medical Service Plans
6331--Fire, Marine, and Casualty Insurance
6351--Surety Insurance 6361--Title Insurance
6371--Pension, Health, and Welfare Funds
6399--Insurance Carriers--NEC

Insurance Offices
6411--Insurance Agents and Brokers

Interior Decorators
7389--Decorators Consulting Service--Interior

Internet Service Providers
7372--Computer Programming and Other Software Services
7374--Data Processing Services
7399--Business Services--NEC

Interurbans
4111--Local and Suburban Transit
4119--Local Passenger Transportation--NEC
4131--Intercity and Rural Bus Transportation

Investment Companies
6159--Investment Companies 6211--Investment Bankers