intelligent terminal


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intelligent terminal

[in′tel·ə·jənt ′ter·mən·əl]
(computer science)
A computer input/output device with its own memory and logic circuits which can perform certain operations normally carried out by the computer. Also known as smart terminal.

intelligent terminal

(hardware)
(or "smart terminal", "programmable terminal") A terminal that often contains not only a keyboard and screen, but also comes with a disk drive and printer, so it can perform limited processing tasks when not communicating directly with the central computer. Some can be programmed by the user to perform many basic tasks, including both arithmetic and logic operations. In some cases, when the user enters data, the data will be checked for errors and some type of report will be produced. In addition, the valid data that is entered may be stored on the disk, it will be transmitted over communication lines to the central computer.

An intelligent terminal may have enough computing capability to draw graphics or to offload some kind of front-end processing from the computer it talks to.

The development of workstations and personal computers has made this term and the product it describes semi-obsolescent, but one may still hear variants of the phrase "act like a smart terminal" used to describe the behaviour of workstations or PCs with respect to programs that execute almost entirely out of a remote server's storage, using said devices as displays.

The term once meant any terminal with an addressable cursor; the opposite of a glass tty. Today, a terminal with merely an addressable cursor, but with none of the more-powerful features mentioned above, is called a dumb terminal.

There is a classic quote from Rob Pike (inventor of the blit terminal): "A smart terminal is not a smart*ass* terminal, but rather a terminal you can educate". This illustrates a common design problem: The attempt to make peripherals (or anything else) intelligent sometimes results in finicky, rigid "special features" that become just so much dead weight if you try to use the device in any way the designer didn't anticipate. Flexibility and programmability, on the other hand, are *really* smart.

Compare hook.

intelligent terminal

A terminal with built-in processing capability, but no local disk or tape storage. It may use a general-purpose CPU or may have specialized circuitry as part of a distributed intelligence system. Contrast with dumb terminal.
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