What is now being described as a network computer was originally conceived as a television set-top box enabling viewers to order video programs and information.

That system, like the one chosen, television experts said, would also have enabled viewers to continue using standard television sets.

"It was perhaps the first computer-animated film that enabled viewers to forget they were watching computer animation," wrote Price.

New programs are sometimes presented as a live broadcast and web simulcast, enabling viewers to participate and ask questions during the program.

Video will be available in high quality, enabling viewers to watch on the internet near-television quality video.

This fly-on-the-wall documentary enabled viewers to look behind the scenes at the everyday running of the hotel.

In May 1998 it was moved to its current time slot at 19:00, enabling viewers to watch both programmes.

All songs on the program were accompanied by karaoke-style on-screen lyrics, enabling viewers to sing along at home.

It enabled viewers to enter the lives of fictional characters forced to make critical decisions with profound moral, ethical or social implications.

Live webcams around the country enabled viewers to follow animal stories on the Springwatch website.