There are networks everywhere: around the world, in offices, in schools, in major government institutions. So why not have computer networks that are similar to television networks or telephone networks? A television network is enormously complicated. It has got satellites and relay stations and cable head-ins and recording studios. You have this huge, professionally managed network, accessed by a very low-cost and simple appliance, the television. Anyone can learn how to use a television. Ninety-seven percent of American households have televisions. Ninety-four percent of American households have telephones. The telephone: again, a very simple appliance attached to an enormously complex, professionally managed network. Why shouldn’t the computer network be just the same?