Добавил:
Upload Опубликованный материал нарушает ваши авторские права? Сообщите нам.
Вуз: Предмет: Файл:
Information Technologies Development and Perspe...doc
Скачиваний:
19
Добавлен:
01.04.2025
Размер:
2 Мб
Скачать
☆

21. Render the following:

It is known that one of the fundamental parts of the computer is a control unit. This unit controls the computation process automatically, without man’s participation. It sends signals to all other parts of the computer to specify what they must do. First of all, the control unit tells the main memory what data must be transferred to the arithmetic-logical unit and other devices. Then it enables the arithmetic-logical unit to perform the required operation. Finally, it places the obtained results in the main memory.

It is important to note that the control unit operation is determined by an algorithm of a problem solution. The algorithm is a sequence of arithmetic and logical operations. These operations must be performed on the initial data for solving the problem.

Description of an algorithm in a form acceptable by a computer is called a program. A program is a list of sequential computer instructions enabling a computer to solve a problem. In order to be acceptable by the computer instructions must be encoded into a digital form.

In conclusion it should be pointed out that the main feature of a computer is automatic control of the problem solution process. It is based on the programmed-control principle.

22. Match the following terms with their definitions. Think of the corresponding Russian equivalents.

1. CPU

2. CU

3. ALU

4. accumulator

5. clock

6. counter

7. register

8. decoder

9. comparer

10. adder

a) performs the processing operations;

b) carries out logical comparisons of storage;

с) executes basic arithmetic functions;

d) coordinates the operation of the whole system;

e) selects data from memory;

d) produces electronic marks at regular intervals;

g) controls the flow between the primary storage and the arithmetic-logical unit;

h) keeps the instruction while it is being performed;

i) holds the results of processing operations;

j) breaks the instructions into separate com­mands

Unit II

Input / Output Devices

In a Computer Shop

1. Imagine you are in a computer shop. Choose five things that would improve your digital life. In pairs, compare your choices.

2. You want to buy a computer. Think of three basic features that will make a big difference to your choice. In pairs, compare your choices.

3. Listen to two people making enquiries in a computer shop. Do they buy anything?

4. Listen again and complete the product descriptions:

iMac

Processor speed 2.33GHz

RAM ___________________________

Hard drive capacity________________

DVD drive included? Yes

Operating system__________________

Includes internet software

Price ___________________________

MacBook

Processor speed ____________________

RAM ____________________________

Hard drive capacity_________________ DVD drive included?_______________

Operating system __________________

Includes internet software

Price £1,029

Соседние файлы в предмете [НЕСОРТИРОВАННОЕ]