Developed in the 1930s, the Standard Industrial Classification (SIC) code is a 4-digit scheme that organizes 1,004 industries. Some 400 of these are services.
Developed in 1997, the North American Industrial Classification System (NAICS), is a six-digit scheme that organizes 1,170 industries, of which 565 are services. Many of the NAICS industries emerged over the past 20 years.
The North American Industrial Classification System (NAICS) defines the following codes for various aspects of the hospitality industry:
Scope notes within NAICS (below) will indicate which are most appropriate.