This five-minute video introduces NAICS (North American Industrial Classification System) codes and demonstrates how to identify an industry's code using the Census web site. SIC codes are covered, too.
NAICS is the North American Industrial Classification System:
Examples of NAICS codes:
513 Broadcasting and telecommunications
51332 Wireless telecommunications carriers (except satellite)
513322 Cell phones and cell phone service
So what? NAICS make it easy to: