Internet (Internet, IFA: [ˈɪn.tə.net]) is a worldwide system of interconnected computer networks for storing and transmitting information. Formerly referred to as the World Wide Web and Global Network, as well as just the Net. It is based on the TCP/IP protocol stack. The World Wide Web (WWW) and many other data transmission systems are based on the Internet. By early 2020, the number of users had reached 4.5 billion, which is more than 50% of the Earth's population. This was largely due to the widespread use of cellular networks with Internet access standards 3G, 4G and 5G, the development of social networks and the falling cost of Internet traffic.