The effect of superimposing a slowly changing electrical signal onto a much faster carrier signal, so that the faster signal can be used to convey information. Central to radio. Multimedia The presentation of information or entertainment by a combination of data, images and sounds. Can be delivered in a variety of ways - on a computer disk, through modified televisions, or using a computer connected to a telecommunications channel. Network A collection of linked computers which can exchange data, share resources, or even make use of each other's software.
Networks allow people to communicate, and work cooperatively.
They also make it easy to monitor and control work at one computer from another, remote computer. NII National information infrastructure, see data superhighway. On-line To be actively connected to a network, usually a WAN, or a remote computer. On-line databases are databases stored on remote computer systems accessible across a network. Optical fibre Translucent fibre which can transmit beams of laser light.