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The Internet evolved in stages: packet-switching research and ARPANET laid early foundations; open protocols connected independent networks; the World Wide Web made information easier to publish and browse; and commercial infrastructure, broadband and mobile access brought the network to billions. The Web is one system that runs over the Internet—not another name for the Internet.
What is the Internet, and how did it begin?
The Internet is a network of networks: independently operated networks linked so computers and other devices can communicate. Its roots lie in packet-switching research and ARPANET, an early network that helped demonstrate ways to connect computers. Those foundations were not yet the same thing as today’s worldwide Internet. The larger change was developing an architecture that could link different networks—including packet satellite and packet radio networks—rather than requiring every computer to belong to one system. The Internet Society’s history describes this transition.
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There is no single date that captures the Internet’s beginning. Early research, ARPANET, the interconnection of distinct networks, shared technical standards and later commercial expansion were parts of a longer process. Treating any one of them as the sole starting point oversimplifies how the network took shape.
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How is the Internet different from the World Wide Web?
The Internet is the underlying network infrastructure; the World Wide Web is an information system that uses it. The Web combines computers, data networks and hypertext so people can follow links between information. Email, file transfer and remote access are other Internet services, not parts of the Web.
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Tim Berners-Lee proposed the Web at CERN in March 1989 to help researchers share information. CERN had an operating Web server and browser by the end of 1990, and Web software was released and announced in 1991. CERN’s short history of the Web documents these early steps. Berners-Lee proposed and developed the Web; he did not invent the Internet.
What changed as the Web spread?
In 1993, the Mosaic browser helped bring the Web to a wider audience. On 30 April that year, CERN made the Web’s source code available royalty-free, supporting its spread beyond the original research setting. The Web was initially only one use of the Internet: CERN reports that it accounted for 1% of Internet traffic in late 1993, when remote access, email and file transfer made up the rest.
CERN’s historical milestones show how quickly that use grew: by late 1993, more than 500 Web servers were known; by the end of 1994, there were 10,000 servers, including 2,000 commercial ones, and an estimated 10 million users. These are historical figures reported by CERN, not current counts.
How did the Internet become commercial and widely available?
Internet growth depended not only on technology but also on how networks were built, funded and connected. Open protocol documentation and collaborative standards work allowed independently designed networks and equipment to interoperate. That approach helped the Internet grow without one organization having to build or own the entire system.
A major economic transition came in 1995, when funding for the NSFNET backbone ended. Regional networks shifted toward buying national-scale connectivity from private long-haul networks. The Internet Society’s account says there were more than 50,000 networks by then, about 29,000 of them in the United States. The figure describes networks—not individual users or devices.
How has Internet access changed in the mobile era?
Internet access now includes extensive mobile broadband and 5G, alongside fixed connections. Mobile access has become a major part of connectivity, but it has not eliminated the need for fixed networks. ITU reported that mobile broadband made up 89% of mobile subscriptions in 2025, compared with less than 50% in 2015. It estimated that 5G represented about one-third of mobile broadband subscriptions in 2025. These are subscription figures, not counts of unique people: an individual may have multiple subscriptions, and subscriptions can serve connected devices. ITU’s 2025 subscription report explains the trend.
In a home, Wi-Fi can connect phones, computers and other devices to a local network, which in turn reaches the Internet through a broadband service. Wi-Fi is not itself the Internet connection, just as a mobile signal is an access method rather than the whole global network.
How many people are online today, and who is still offline?
The International Telecommunication Union estimated that about 6 billion people—74% of the world’s population—used the Internet in 2025, while 2.2 billion remained offline. These are annual estimates, not a real-time headcount. ITU also estimated that 5G networks covered 55% of the global population that year, but coverage varied sharply: 84% in high-income countries and 4% in low-income countries. ITU’s 2025 Facts and Figures provides these estimates.
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Coverage does not guarantee that a person can afford a connection or use it effectively. The Internet’s evolution is therefore not only a story of faster technologies and more users; it is also an unfinished effort to make access available, affordable and useful across different communities.
Quick Recap
The Internet’s evolution at a glance
| Period | What changed |
|---|---|
| Early networking research and ARPANET | Packet switching and early network experiments established foundations for connecting computers. |
| Development of open interconnection | Shared protocols made it possible to link independently designed networks. |
| 1989–1991 | Berners-Lee proposed the Web at CERN; an early server and browser followed, and Web software spread. |
| 1993–1994 | Mosaic, CERN’s royalty-free source-code release and rapid growth in Web servers and users helped broaden Web adoption. |
| 1995 | NSFNET backbone funding ended as regional networks turned to private long-haul providers for national-scale connectivity. |
| 2015–2025 | Mobile broadband and 5G became an increasingly large part of subscriptions, while access and coverage remained unequal. |
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