OverviewThe Internet is a system of computer networks that communicate and connect to each other via protocols that have been defined within the Internet Protocol Suite (TCP/IP). One of the core protocols of TCP/IP is the Internet Protocol (IP) that creates a datagram and address system for the computer networks of the Internet to communicate with one another. The Internet evolved out of computer networks that were created in the United States of America, primarily: ARPANET and NSFNET. These networks were designed for educational research purposes. The modern Internet was formed in the late 1980s and early 1990s when commercial networks wanted to access NSFNET. The organisation that manages the development of the Internet is the Internet Society. How users of the Internet connect to it has evolved over the past three decades, to begin with desktop computers with a dialup connection were just about the only option to connect to the Internet. In 2025, smartphones using wireless mobile networks are the most common way to connect to the Internet.