unit-5e.ppt
- 2. 6 elements of communication computer system • Human being • Hardware • Software • Data / information • Procedure • Communication
- 3. What is hardware? • Hardware is best described as a device that is physically connected to your computer or something that can be physically touched. A CD-ROM, monitor, and printer are all examples of computer hardware.
- 4. • Without any hardware your computer would not exist and software would have nothing to run on.
- 5. 5 main function of hardware • Input • Processing • Output • Storage • Communication
- 7. Input Device • Input device is a tool to interpret the symbol that understand by human being to the symbol that computer understand to process. • Device for entering information into a computer.
- 8. INPUT DEVICE Keyboard entry Direct entry
- 9. Keyboard Entry Numeric key Escape key Data will be input into the computer using the keyboard Function key Windows key Space bar key Cursor key
- 10. Direct Entry Device – This device is to create data that can be read by machine and direct enter to the CPU. – Direct entry device is divide to • pointing, • scanner and • voice input device
- 11. Direct entry device – Pointing Devices • Mouse • Trackball • Touch screen • Digital camera
- 12. Direct entry device • Example: – Digitizer – Joystick – Game Controller – Gamepad
- 13. Direct entry device • Scanner Devices – Scan text, image, drawing or special symbol – Images are recorded in digital form.
- 14. Scanner • Image scanner • Bar code reader • Fax machine • Character recognition
- 15. Voice Input Device • This device is change the human voice into digital code. • Example : – microphone
- 16. OUTPUT DEVICE • Output device is a tool to interpret the code that understand by computer to the symbol or language that understand by human being. • Device for appearing an information from computer.
- 17. Output Device • Output Devices are divided by 4 : –Monitor –Printer –Plotter –Voice output device
- 18. Types of monitor CRT – cathode ray tube LCD – Liquid crystal display monitor
- 19. Printer • Printer is a tools for transferring information onto paper, that is truly external to the other functions of the computer.
- 20. Printer • 4 types of printer : – Ink jet – Dote matrix – Thermal – Laser jet
- 21. Plotter • Plotter is a special device to create chart, map, 3D illustration and architectural drawing • Plotter is divide by 4 : – Pen plotter – Electrostatic plotter – Ink jet plotter – Direct image plotter
- 22. Voice Output Device • This device is function to outward the sound.