Simply put, the Internet is a worldwide computer network. A computer network is one or more computers connected together with cables that can communicate with each other.

More specifically, the Internet is a collection of computer networks that are made up of smaller computer networks. Each network can be of a different type, running a different computer platform and operating systems. These networks "talk" to each other through the telephone system which connects them all together.

To get a better idea of what the Internet is, imagine it as a telephone system for computers. The telephone system is a worldwide network that allows you to call anyone in the world. The Internet is worldwide network that allows computers to talk to any other computer that is connected to this it.