INFORMATION TECHNOLOGY COMPUTER HARDWARE
6 elements of communication computer system • Human being • Hardware • Software • Data / information • Procedure • Communication
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.
Without any hardware your computer would not exist and software would have nothing to run on.
5 main function of hardware • Input • Processing • Output • Storage • Communication
TYPES OF HARDWARE INPUT OUTPUT
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.
INPUT DEVICE Direct entry Keyboard entry
Function key Keyboard Entry Numeric key Escape key Data will be input into the computer using the keyboard Windows key Cursor key Space bar key
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
Direct entry device • Pointing Devices • Mouse • Trackball • Touch screen • Digital camera
Example: Digitizer Joystick Game Controller Gamepad Direct entry device
Direct entry device • Scanner Devices • Scan text, image, drawing or special symbol • Images are recorded in digital form.
Image scanner Bar code reader Fax machine Character recognition Scanner
Voice Input Device • This device is change the human voice into digital code. • Example : • microphone
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.
Output Device • Output Devices are divided by 4 : • Monitor • Printer • Plotter • Voice output device
Types of monitor CRT – cathode ray tube LCD – Liquid crystal display monitor
Printer is a tools for transferring information onto paper, that is truly external to the other functions of the computer. Printer
Printer • 4 types of printer : • Ink jet • Dote matrix • Thermal • Laser jet
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 Plotter
This device is function to outward the sound. Voice Output Device