AN INTRODUCTION TO COMPUTER
INTRODUCTION
computer is a digital electronic machine.Current computers can perform
conventional arrangements of tasks known as programms. An expansive scope of
modern and customer items use computers as control frameworks.Computer
components are divided into two major categories, namely, hardware and software
WHAT IS A COMPUTER?
Computer is a gadget that changes information into significant data.
Information can be in any way similar to marks got by you in different subjects. It
can likewise be name, age, sex, weight, tallness, and so on of the multitude of
understudies in a class. computer can likewise be characterized as far as capacities
it can perform. A computer can I) acknowledge information, ii) store information,
iii) process information as wanted, and iv) recover the put away information as and
when required and v) print the outcome in wanted organization. The significant
attributes of a PC are high velocity, precision, tirelessness, adaptability and capacity.
COMPUTER ORGANISATION
The PCcomputer performs fundamentally five significant activities of works
independent of their size and make. These are 1) it acknowledges information or
guidance via input, 2) it stores information, 3) it can deal with information as
expected by the client, 4) it gives results in the type of result, and 5) it controls all
tasks inside a computer.
● Input: this is the process of entering data and programs
into the computer system.
● Control Unit (CU): The process of input, output, processing and storage is
performed under the supervision of a unit called 'Control Unit'. It decides
when to start receiving data, when to stop it, where to store data, etc. It takes
care of step -by-step processing of all operations in side the computer.
● Memory Unit: Computer is used to store data and
instructions.
● Arithmetic Logic Unit (ALU): The major operations
, performed by the ALU are addition, subtraction,
multiplication, division, logic and comparison.
● Output: This is the process of producing results from the
data for getting useful information.
The ALU and the CU of a computer system are jointly known as the central
processing unit (CPU). You may call CPU as the brain of any computer system.
PERIPHERAL DEVICES
Peripheral devices are connected to the computer externally. These devices
are used for performing some specific functions.
Peripheral devices are as follows:
1.Input Devices
2.Output Devices
3.Other Peripherals
INPUT DEVICES
Input devices accept data and instructions from the user. Following are the
examples of various input devices, which are connected to the computer for this
purpose.
1.Keyboard
2.Mouse
3.Light Pen
4.Optical/magnetic Scanner
5.Touch Screen
6.Microphone for voice as input
7.Track Ball
1. Keyboard
A keyboard is the most well-known info gadget. A few sorts of consoles are
accessible, however they take after one another with minor varieties. The keyboard
in most normal use is the QWERTY board. By and large standard keyboard has 104
keys. In these keyboard, the cursor control keys are copied to permit simpler use of
the numeric pad.
2. Mouse
A mouse is an electro-mechanical, hand-held device. It is utilised as a pointer.
It can fill roles like choosing menu orders, moving symbols, resizing windows,
beginning projects, and picking choices.
INTRODUCTION
computer is a digital electronic machine.Current computers can perform
conventional arrangements of tasks known as programms. An expansive scope of
modern and customer items use computers as control frameworks.Computer
components are divided into two major categories, namely, hardware and software
WHAT IS A COMPUTER?
Computer is a gadget that changes information into significant data.
Information can be in any way similar to marks got by you in different subjects. It
can likewise be name, age, sex, weight, tallness, and so on of the multitude of
understudies in a class. computer can likewise be characterized as far as capacities
it can perform. A computer can I) acknowledge information, ii) store information,
iii) process information as wanted, and iv) recover the put away information as and
when required and v) print the outcome in wanted organization. The significant
attributes of a PC are high velocity, precision, tirelessness, adaptability and capacity.
COMPUTER ORGANISATION
The PCcomputer performs fundamentally five significant activities of works
independent of their size and make. These are 1) it acknowledges information or
guidance via input, 2) it stores information, 3) it can deal with information as
expected by the client, 4) it gives results in the type of result, and 5) it controls all
tasks inside a computer.
● Input: this is the process of entering data and programs
into the computer system.
● Control Unit (CU): The process of input, output, processing and storage is
performed under the supervision of a unit called 'Control Unit'. It decides
when to start receiving data, when to stop it, where to store data, etc. It takes
care of step -by-step processing of all operations in side the computer.
● Memory Unit: Computer is used to store data and
instructions.
● Arithmetic Logic Unit (ALU): The major operations
, performed by the ALU are addition, subtraction,
multiplication, division, logic and comparison.
● Output: This is the process of producing results from the
data for getting useful information.
The ALU and the CU of a computer system are jointly known as the central
processing unit (CPU). You may call CPU as the brain of any computer system.
PERIPHERAL DEVICES
Peripheral devices are connected to the computer externally. These devices
are used for performing some specific functions.
Peripheral devices are as follows:
1.Input Devices
2.Output Devices
3.Other Peripherals
INPUT DEVICES
Input devices accept data and instructions from the user. Following are the
examples of various input devices, which are connected to the computer for this
purpose.
1.Keyboard
2.Mouse
3.Light Pen
4.Optical/magnetic Scanner
5.Touch Screen
6.Microphone for voice as input
7.Track Ball
1. Keyboard
A keyboard is the most well-known info gadget. A few sorts of consoles are
accessible, however they take after one another with minor varieties. The keyboard
in most normal use is the QWERTY board. By and large standard keyboard has 104
keys. In these keyboard, the cursor control keys are copied to permit simpler use of
the numeric pad.
2. Mouse
A mouse is an electro-mechanical, hand-held device. It is utilised as a pointer.
It can fill roles like choosing menu orders, moving symbols, resizing windows,
beginning projects, and picking choices.
