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A
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The processor
The processor, also called the CPU or central processing unit, is the
brain of your computer. In PCs, it is built into a single chip – a small
piece of silicon with a complex electrical circuit, called an integrated circuit
– that executes instructions and coordinates the activities of all the
other units.
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B
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RAM and ROM
When you run
a program, the CPU looks for it on the hard disk and transfers a copy into
the RAM. RAM (random access memory) is temporary or volatile, that is, it
holds data while your PC is working on it, but loses this data when the
power is switched off.
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C
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Units of memory
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EXERCISES
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8.1
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Look at A and B opposite. Then match the sentence beginnings (1-6)
with the correct endings (a-f).
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1
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The CPU processes data and
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a
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areas within the CPU.
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2
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The control
unit is the part of the CPU that
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b
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You can’t
make changes to it.
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8.2
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Solve the
clues and complete the puzzle with words from the opposite page.
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1
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Intel
_______ are used in many computers.
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2
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Each 0 or
1 is called a bit, short for _______ digit.
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3
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Special
cards can be inserted into expansion _______.
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8.3
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Read this product description
and answer the questions below.
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1
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How fast is
the CPU?
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2
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Which term
is used to describe the CPU data bus?
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3
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How much RAM does the
computer have?
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4
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Can you add
extra RAM chips? How many?
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8.4
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Look at C
opposite. Fill in the blanks with the correct unit of memory.
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