3. Computer:
Computeris an electronic machine used to solve different problem according to a set of instruction
given to it. A computercan accept data process data into useful information and store it for letter
use. The computerwords is drive from computer that means to calculation.
Structure:
Computerare available in different shapes and size monitor, speaker, system unit, keyboard,
mouse etc.
Characteristics of computer:
1. Speed
2. Reliability
3. Accuracy
4. Storage
5. Versatility
6. Consistency
7. Control sequence
4. Hardware:
Physical part of computeris called hardware. There are two many typesof hardware.
1. Input device
2. Output device
Input device:
The data and instruction given to the computeris called input device. A hardware
componentsused to enter data and instruction into computeris called input devices
most commonly used input device keyboard, mouse, microphone, scanner digital
camera etc.
6. Output device:
The data process into useful information is called output. A hardware components used to
display information to the user is called output devices Most commonly used output device
monitor printer speaker is used to display text graphics and video output.
System unit:
System unit is a case that contain different electronic components of computer used to
process data.
Two main components
CPU stand for central processing unit it is also called processor. It is brain of computer most
important components of computer.
Main memory the hardware components that store data and instruction temporary is called
memory. It is also called primary memory or main memory.
7. Storage device:
The hardware components used to store data and information permanently are called story
devices. The storage devices are available in different size and capacities.
Example:
Hard drive:
Store data and Program
Flash drive:
Use to store documents photos audio and video
Memory card:
Use to store photo audio and music files
8. Communication device:
Hardware componentsused to communication and exchange data information with
other computercall communication devices.
Example:
Modem:
Used to connect computerto the internet
Network card:
Used to connect componentsto computernetwork
Router:
Used to connect different devices to share data and internet connection
