Dozens of companies produce plain white socks. The standard technology for producing socks is widely known and available to anyone who wants to enter the business. Four Internet providers offer similar services to almost everyone in the city. Any new Company would have to engage in a price war with the existing companies. Scholastic Inc. owns the U.S. copyright to a popular series of books. It is the only company with the legal right to publish these books in the United States. Hundreds of colleges serve millions of students each year. The colleges vary by location, size, cost, and educational quality