Contents

UNIT 1.Computer applications…………………………..2

UNIT 2. Types of computers……………………………..7

UNIT 3.Computer essensials……….……………………11

UNIT 4. Bits and bytes …………………………………...22

UNIT 5. Input devices…………………………………….27

UNIT 6. The output……………………………………….35

UNIT 7.Storage devices…………………………………...42

UNIT 8. Basic software……………………………………51

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