ISP

Originally, the Internet (originally known as ARPAnet) was developed as a network that connected government research laboratories and participating university departments. Through a direct connection to the backbone or through agreements with affiliated companies, which often used dial-up tools such as UUCP, other companies and organizations became involved. In the late 1980s, steps were taken toward public and commercial use of the Internet. 

An Internet service provider (ISP) is an organization that provides various services for accessing, using, managing, or participating in the Internet. ISPs can take various forms, such as commercial, community, non-profit, or private.

Typical Internet services offered by ISPs include Internet access, Internet transit, domain name registration, Web hosting, Usenet service, and colocation.

As a gateway that allows users to access all services available on the Internet, an ISP serves as an access point. This type of network is also known as an "eyeball network.