While lists like the Fortune 500 are chock-full of companies and brands that are familiar to just about everyone — Walmart, Exxon, Apple, Coca-Cola, IBM — there are plenty of businesses that don’t have that same level of name recognition, even if they have thousands of employees and bring in billions of dollars.

Without resorting to Google, Wikipedia, or asking your day-trading co-worker, take the quiz below to see if you know what business each of these ten Fortune 500 companies is in.

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