It looks like you're using Internet Explorer 11 or older. This website works best with modern browsers such as the latest versions of Chrome, Firefox, Safari, and Edge. If you continue with this browser, you may see unexpected results.
2. Consider related industries. Supply and demand industries. Substitute industries.
3. Zoom out. There are a lot of very small, niche industries in the world. If you can't find information on your specific industry, use a more general term. (e.g., "athletic shoe manufacturing" --> "shoe manufacturing").
North American Industry Classification Search (NAICS) is a system that assigns a 6 digit number to each industry and sub-industry operating in North America. Standard Industrial Classification (SIC) is a system using a 4 digit code to identify industries. NAICS is gradually replacing SIC in most business and economic databases, but still can be used in some databases or articles.