Despite its short history, the internet has been evolving constantly. With the latest internet technology, users can visit social networking sites and access and share material with high quality sound and images. This has revolutionized home entertainment. Music and films can be bought and quickly downloaded, and many radio stations and TV channels have also made their programmes available to be streamed at any time. Furthermore, users can download podcasts of everything from films to university lectures, and watch or listen to them when and where they want.