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Raysoft Computers Ltd.

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The Coach House
Ray Demesne Kirkwhelpington
Newcastle Upon Tyne
NE19 2RG


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computers

1. Also called processor. an electronic device designed to accept data, perform prescribed mathematical and logical operations at high speed, and display the results of these operations. Cf. analog computer, digital computer.
2. a person who computes; computist.
1. to determine by calculation; reckon; calculate: to compute the period of Jupiter''''s revolution.
2. to determine by using a computer or calculator.
3. to reckon; calculate.
4. to use a computer or calculator.
5. Informal.to make sense; add up: His reasons for doing that just don''''t compute
1. computer, computing machine, computing device, data processor, electronic computer, information processing system, machine
usage: a machine for performing calculations automatically
2. calculator, reckoner, figurer, estimator, computer, expert
usage: an expert at calculation
The control unit manages the computer''s various components; it reads and interprets the program instructions, transforming them into a series of control signals which activate other parts of the computer. Control systems in advanced computers may change the order of some instructions so as to improve performance.

A key component common to all CPUs is the program counter, a special memory cell that keeps track of which location in memory the next instruction is to be read from.

The control system''s function is as follows—note that this is a simplified description, and some of these steps may be performed concurrently or in a different order depending on the type of CPU:

Read the code for the next instruction from the cell indicated by the program counter.
Decode the numerical code for the instruction into a set of commands or signals for each of the other systems.
Increment the program counter so it points to the next instruction.
Read whatever data the instruction requires from cells in memory . The location of this required data is typically stored within the instruction code.
Provide the necessary data to an ALU or register.
If the instruction requires an ALU or specialized hardware to complete, instruct the hardware to perform the requested operation.
Write the result from the ALU back to a memory location or to a register or perhaps an output device.
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newcastle upon tyne

Newcastle upon Tyne is a city and metropolitan borough of Tyne and Wear, in North East England. Situated on the north bank of the River Tyne, the city developed in the area that was the location of the Roman settlement called Pons Aelius, though it owes its name to the castle built in 1080, by Robert II, Duke of Normandy, the eldest son of William the Conqueror. The city grew as an important centre for the wool trade and it later became a major coal mining area. The port developed in the 16th century and, along with the shipyards lower down the river, was amongst the world''s largest shipbuilding and ship-repairing centres. These industries have since experienced severe decline and closure, and the city today is largely a business and cultural centre, with a particular reputation for nightlife.

Like most cities, Newcastle has a diverse cross section, from areas of poverty to areas of affluence. Among its main icons are Newcastle Brown Ale, a leading brand of beer, Newcastle United F.C., a Premier League team, and the Tyne Bridge. It has hosted the world''s most popular half marathon, the Great North Run, since it began in 1981.