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Academia - Collins - Scientific Pocket Dictionaries - Computer - English - French - Arabic Letter 1_ R

radio - paging
méssage m par radio

Radio calling. A service provided by the British Telecom Corporation that allows the device holder to be called by someone who requests a specific phone number. The device only works intermittently, thus drawing the attention of its holder that someone wants to contact him. Similar devices are used by doctors in hospitals, firefighters and foremen.

random access memory (RAM)
memory f à accès aléatoire

Random access memory. A set of storage locations, each of which can be accessed directly and without starting from the first location. These memories can be written to and read from, and the time to access all locations is almost equal. Random access memory (RAM) is volatile memory, as everything in it is lost as soon as the power is cut off.
We tend to think of semiconductor memories as the RAM equivalent of the core store, although magnetic movable memories such as disk and drum are also RAMs but have a longer acquisition time. The semiconductor that represents RAM can be housed in a junction transistor or a field-effect transistor. The former provides faster acquisition, while the latter provides dynamic RAM and a similar static memory, although dynamic is cheaper but requires additional logic circuitry to check the contents regularly.

random numbers
nombres mpl alétoires

Random numbers. A set of numbers, each of which is chosen at random. However, this is not really possible in most machines; we are talking about a pseudo random sequence of numbers generated by a microcomputer.

Read-only memory (ROM)
memory of death

Read-only memory. Memory stores data or instructions permanently and cannot be changed by the computer or programmer. The actual content of the read-only memory is fixed from the moment it is created (programmable read-only memory (PROM) is fixed by the user using a special device, while erasable and programmable read-only memory (EPROM) can be changed by the user with difficulty).

For example: a semiconductor that represents read-only memory can be used to store the BASIC language in a microcomputer or to store control programs in a pocket calculator and other hand-held devices.

read/write memory
memory of life

Read/write memory. Unlike read-only memory (ROM), this type of memory can also be written to in addition to being read. RAM can be a random access memory (RAM) or a file, but it can also include serial access memory such as bubble memory and magnetic tape.

real time processing
treatment m en temps réel

Real-time processing. This term is used to describe a computer system that accepts data, updates its records, and produces results almost immediately, so that it can affect the source of the data. This system is not like the backing store of a point-of-sale, which a computer may access once a day.

For example, an airline reservation system can be accessed by remote terminals. Upon receipt of a reservation, the system checks the location, updates its records, and confirms the reservation has been accepted. From that moment on, other users will find that the location is unavailable.

re - boot
réamorçage m

Reboot. A term that directs the user to boot the system again, and is often used when a program error occurs or is stuck in an endless loop from which it cannot get out. It is also used as a method of changing the program stored in a microcomputer. Reset and reformat.

red, green, blue (RGB)
rouge, vert, bleu

Red, green, blue A video signal system that uses these three colors to produce sharper images than can be obtained with a single signal.

reduced instruction set computer

reduced instruction set computer.

see RISC.

registre
registre m

platform. A special type of location in a computer used for specific purposes. The platforms are generally one or two computer words long.

For example, one platform might be used as an accumulator, and another as a store address platform.