There are many different avenues to take when researching companies. Here you will find resources about:
Using these codes makes industry research a lot easier. Find out what they are and how to look them up.
This is a great place to start if you don't know anything about the industry. Learn how to find industry profiles and market research reports.
Industry associations and professional associations collect data that matter to their members and may have information you can't find anywhere else.
Some industries have governmental regulation that may significantly affect how they do business.