3. A computer is an electronic device used to process data, converting data into information that is useful to people.

4. A complete computer system includes four distinct parts : Hard wear Soft wear Data User

5. The computer system Defined: Hard wear Types of Hard wear: : * Processor * Memory * Input and Output (I/O devices ) * Storage devices

6. What is input Data or instruction entered into memory of computer Input device Is any hard wear component used to enter data.

7. What are the two types of input * Data : Unprocessed text, number, images and video * Instructions : 1/ programs 2/ commands 3/ user responses

8. How is the keyboard divided Typing area Numeric keypad Function keys, special keys

9. What is a mouse Pointing device that fits under palm of hand Pointing device / controls movement of pointer, else called mouse pointer Mechanical mouse Has rubber or metal ball on underside

10. What are common mouse operation *Point *Click / double click / triple click *Drag / right drag *Rotate wheel / press wheel button

11. What is a scanner Light-sensing device that reads printed text and graphics Used for image processing, converting paper document into electronic images