An industry classification code can ensure relevant results since many databases allow you to use this code to search the contents. Two codes that are assigned to all US businesses are NAICS (North American Industry Classification System) and its precursor SIC (Standard Industrial Classification).
If you have trouble finding the right code, you can always look for a similar/competing company in a database such as Reference USA and find the codes there.
An industry classification code can ensure relevant results since many databases allow you to use this code to search the contents. Two codes that are assigned to all US businesses are NAICS (North American Industry Classification System) and its precursor SIC (Standard Industrial Classification).
If you have trouble finding the right code, you can always look for a similar/competing company in a database such as Reference USA and find the codes there.