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Academia - Collins - Pocket Dictionaries - Computer - English - French - Arabic Letter 1_F

facsimile
télécopie f

See FAX .

fail - safe
fiable

Fail-safe. This term is used to describe a computer system or peripheral device that is able to shut down properly if a fault occurs.

fast line
line f rapide

Fast line. Data transmission rates are usually given in baud. Prestel sends data to the user at 1200 baud, although this speed on telephone lines can result in data being lost or scrambled. Private direct lines available from British Telecom can send data at 48,000 or 96,000 baud.
These lines are known as fast lines.

fault tolerant
tolérant de panne

Fault-tolerant. Some computers are designed with backup circuits so that if a failure occurs, the backup circuit automatically starts working. Sometimes, the backup circuit "mirrors" the activity of its main circuit so that data is not lost during the transfer. Failure-tolerant computers are more expensive, but they are essential for applications where a computer failure would be catastrophic, such as air traffic control.

FAX
télécopieur m

Fax is short for facsimile, a device that scans a document and converts shadows into electronic signals that can be sent over wires or radio waves. These signals are used to create a copy of the original document.

feasibility study
étude f de feasibility

feasibility study . A study conducted by the company before purchasing a new computer system, a team of experts (system analysts) studies the issue to see if a computer is necessary and what type of machine is suitable for the company.

ferrite core
tor f de ferrite

Ferrite core. A piece of magnetic material in the form of a ring the size of a pinhead or smaller. Just as the iron rod C-G or C-G is magnetized, the ring can be magnetized in the direction of clock rotation or counterclockwise, and this is used in binary storage of zeros 0 and ones 1. These cores are built in rows, forming what is known as the core store of the computer.

FET

Abbreviation for field-effect transistor .

fibre optics
fibre m optique

Fibre optics. Modulation of information and its optical transmission along a glass or Perspex fibre. Light entering one end of the fibre is repeatedly reflected off the outer surface of the inner section until it reaches the other end. Total internal reflection occurs when two types of glass are used, and this involves the loss of a very small amount of energy with each reflection.

Glass
Glass
Beam
End section
Reflection sites

These fibres are very thin (less than 1 mm in diameter) and easily bent, so a cable containing several fibres can be installed in the same way as copper cables. A cable of the same size can carry up to 32,000 telephone calls at a time. Normal electrical signals carrying data are used to modulate a laser beam that is sent to a receiver via an optical fibre.

field-effect transistor (FET)
transistor m à effet de champ

Field-effect transistor. Unlike a bipolar or junction transistor, this semiconductor device regulates current as it flows through a narrow channel. Large densities in the logic gates of a silicon wafer are achieved using a field-effect transistor.

FIFO
premier entré premier sorti

First in, first out. It is a type of memory system. Summary first in, first out

file
fichier m

A file. Just as pages of paper make up a file in a filing cabinet, a computer file is a collection of data organized around a specific topic. The file can be in a backup store or in the computer's memory. Each computer file has a name that consists of a limited set of characters, which may be six or eight.