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table
tableau m

Table. In scientific work, the results of experiments are sometimes recorded in a table of values. Temperature and time readings during the cooling of a liquid can be entered in two columns:

Time (seconds)
0
30
60
90
120
150

Temperature (degrees Celsius)
72
60
51
44
38
33

These results can be stored in an array in the computer's memory as follows:

(72,0) (60,30) (51,60) (44,90)...

The arrangement of data in rows and columns is called a table. The locations of items in such a table can be easily determined by a look-up table that directs the computer without having to dig through each item.

tabulator
tabulatrice f

Tabulated. A name given to all the calculating equipment available between 1890 and 1960. Hollerith made the first tabulator that read and counted the 1890 U.S. census numbers from punched cards. Other machines could be programmed by making wire connections between the holes on a control board.


tape
bande f

Tape. A long strip of paper or plastic covered with a magnetic film, used to record data. Paper tape may have 5, 6, 7, or 8 holes to represent each character. Magnetic tape, which is half an inch wide, similarly has 7 or 9 channels across its width. (Audio cassette tape records bits in sequence, one after the other.) The difference with magnetic tape is that data is usually stored in blocks, and the computer checks each block as it is read, in addition to checking the parity bit for each character.

Tbyte

Abbreviation for tetrabyte.

telecommunications
télécommunications fpl

Telecommunications. The transmission of data from one place to another by radio waves or cables.

teleprinter
téléimprimeur m

Teleprinter. Teleprinters and teletypewriters are devices similar to typewriters. Teleprinters were originally designed to send and receive messages serially using a telephone line and a 5-bit code.

Teletypewriters typically operate with 8-bit ASCII code and are used specifically to send and receive messages to and from a computer system.

Both types have a tape reader and punch attached so that tapes can be prepared offline and read later. These machines act as an output device at 10 or 30 characters per second and can be used as a cheap secondary printer for a microcomputer if properly configured.

telesoftware
télélogiciel m

telesoftware. A term describing the transmission of computer software from one computer to another via telecommunications. Teletext is currently available in Britain in the BBC and IBA teletext services and in the British Telecommunications Corporation's Prestel system, although trials are also being carried out on radio transmissions.

teletext
vidéotex m

Teletext. An information service sent as part of a normal television signal. The pages are sent one after the other in an infinite sequence as "dots" out of sight at the top of the television screen. If the receiving device is equipped with a decoder, these top four lines can be made to fill the entire screen.

teletext office
teletext
television studio
electromagnetic wave
teletext
television broadcasting station

The user selects a page number and decodes it when it is next sent. The information provided varies from news pages to sports, food prices, film reviews, etc. The IBA version of teletext is called Oracle and the BBC version is called Ceefax. Current uses of teletext include advertising, local information, and telesoftware.