What are the three types of service providers?

Internet service provider (ISPs) is a company that connects online users through their communications lines to the company's server, which links them to the internet via another company's network access points. Examples are EarthLink and United Online.

Commercial online services is a commercial online service is a members only company that provides not only internet access but other specialized content as well, such as news, games, and financial data. Examples are AOL (America Online) and MSN (Microsoft Network).

Wireless internet service providers is a wireless internet service provider (WISP) enables users with computers containing wireless modems- mostly laptops/notebooks- and web-enabled mobile smartphones and personal digital assistants to gain access to the internet. Examples are T-Mobile, and Verizon.