What is NAICS?

I was just asked this question at the Reference Desk and thought "What a great opportunity to show off this website!" Ask Dr NAICS created by US Census Bureau gives an overview of NAICS (North American Industry Classification System) including what it is and how it's used. It lists 25 popular questions about NAICS and if your question still isn't answered you can email the Census Bureau.

via Biz Ref Desk