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Memory
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. . /: , 2007. . 94 95.
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. . /: , 2007. . 94 95.
Abstract
The subject of the article is computer memory. The article begins with the definition of memory. Then the main functions of memory are described. Advantages and disadvantages of memory components are given. In conclusion the article concerns the main performance characteristics of memory.
The information provided by the article will be useful for the students interested in English as well as computers.
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Memory
Memory is the part of a computer in which information, instructions, and programs are stored. It is interesting to note that memory, one of the basic components of the computer, is often called storage. It s torescalculation program, the calculation formulae, and initial data, intermediate and final results. Therefore, the functions of the computer memory may be classified in the following way. Firstly, the computer memory must store the information transmitted from the input and other devices. Secondly, memory should produce the data needed for the computation process to all other devices of the computer.
Generally, memory consists of two main parts called the main, primary or internal memory and the secondary or external memory. The advantage of the primary memory is an extremely high speed. The secondary memory has a comparatively low speed, but it is capable of storing far greater amount of information than the main memory. The primary storage takes a direct part in the computational process. The secondary storageprovides the information necessary for a single step in the sequence of computation steps.
The most important performance characteristics of a storage unit are speed, capacity and reliability. Its speed is measured in cycle time. Its capacity is measured by the number of machine words or binary digits. Its reliability is measured by the number of failures per unit of time.
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Vocabulary / :
1. memory ,
2. to note ; ;
3. storage () ; ; (); ()
4. to store , ,
5. calculation
6. initial data
7. input-output devices -
8. to produce information
9. to provide data
10. primary (main) memory ()
11. internal memory
12. secondary memory
13. external memory
14. amount
15. performance
16. storage / memory / unit ,
17. speed ;
18. capacity
19. reliability
20. cycle time ( )
21. to be measured
22. machine word
23. binary digit ,
24. the number of failures
25. per unit of time
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