Utilize the input text as a context reference, choose the right relationship between United Rentals and equipment rental from the options. Options: product/material produced, manufacturer, distributed by, industry, position held, original broadcaster, owned by, founded by, distribution format, headquarters location, stock exchange, currency, parent organization, chief executive officer, director/manager, owner of, operator, member of, employer, chairperson, platform, subsidiary, legal form, publisher, developer, brand, business division, location of formation, creator.

And United Rentals Inc. became one of the largest equipment rental companies in the world under Mr. Jacobs’s leadership, with a market value or more than $11 billion.

Answer: industry