HARDWARE
Hardware is all physical devices which is used in computer system or connected with computer for work on system and can touch and see.
Hardware can be divided into following category.
- Input Devices
- Output Devices
- Storage Devices
- Processing Unit
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| Van Neumann Architecture |
1. Input Devices
Input Devices is used to give the Input to Computer for working/processing.
Some input devices are as follows:
a. Keyboard
Keyboard is a device used to type any input in system. It comprises of Alphabet keys A to Z, Numeric Keys 0 to 9, F1 to F12 function keys, few multimedia keys and some others keys like ctrl, Alt, delete, enter etc.
b. Mouse
It is three buttons device looks like a mouse. Left button, Right button and in center scroll button as a wheel. Mouse is used to click on any option or drag any file & folder, to draw any thing etc.
c. Scanner
Scanner is a device connected with computer to scan any page and photo which is available in hard copy and require in digital form or soft copy to send anywhere or for attachment.
d. Lightpen
Lightpen is a pen like device which is used to draw any thing same as with a pen on a paper.
e. Joystick
Joystick is used to play games.
2. Output devices
Output devices are devices which provides the result after processing on the given input.
Some output devices are as follows
a. Monitor
Monitor is a device looks like TV which have screen to show the result of any work which we do on computer.
b. Printer
Printer is devices which is to used to print the result on paper as same as showing on screen. We can print photo and image also in required color and size.
c. Speaker
Speaker is an output device which provide the audio to us. we can listen audio of songs, movies or any other audio which is audible can listen with the help of speaker.
3. Storage Devices
Memory or storage devices can be divided in to two category.
Primary Memory
Secondary Memory
a. Primary Memory
Primary memory is used to process any instruction on given input. RAM (Random Access Memory) & ROM (Read Only Memory) is example of primary memory. From RAM data can be stored in secondary memory.
b. Secondary memory
Secondary memory is used to save any data for future used. CD, Pendrive, DVD, Magnetic Tape , Hard disk is the example of secondary memory.
4. CPU (Central Processing Unit)
CPU consists of two main parts ALU & CU. ALU (Arithmetic and logical unit) used to processing of arithmetical and logical operation. CU is a control unit which controls all the instruction and processes in system.
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