Dharampeth M. P. Deo Memorial Science College, Nagpur
Academic Session 2022-2023
Semester I
Bridge Course Study Material
Today’s world is an information-rich world and it has become a necessity for everyone to
know about computers.
Definition: -
A computer is an electronic data processing device, which accepts and stores data input,
processes the data input, and generates the output in a required format.
Functionalities of a Computer
If we look at it in a very broad sense, any digital computer carries out the following five
functions −
Step 1 − Takes data as input.
Step 2 − Stores the data/instructions in its memory and uses them as required.
Step 3 − Processes the data and converts it into useful information.
Step 4 − Generates the output.
Step 5 − Controls all the above four steps.
Advantages of Computers
Following are certain advantages of computers.
High Speed
Computer is a very fast device.
It is capable of performing calculation of very large amount of data.
The computer has units of speed in microsecond, nanosecond, and even the picosecond.
It can perform millions of calculations in a few seconds as compared to man who will
spend many months to perform the same task.
Accuracy
In addition to being very fast, computers are very accurate.
, The calculations are 100% error free.
Computers perform all jobs with 100% accuracy provided that the input is correct.
Storage Capability
Memory is a very important characteristic of computers.
A computer has much more storage capacity than human beings.
It can store large amount of data.
It can store any type of data such as images, videos, text, audio, etc.
Diligence
Unlike human beings, a computer is free from monotony, tiredness, and lack of
concentration.
It can work continuously without any error and boredom.
It can perform repeated tasks with the same speed and accuracy.
Versatility
A computer is a very versatile machine.
A computer is very flexible in performing the jobs to be done.
This machine can be used to solve the problems related to various fields.
At one instance, it may be solving a complex scientific problem and the very next
moment it may be playing a card game.
Reliability
A computer is a reliable machine.
Modern electronic components have long lives.
Computers are designed to make maintenance easy.
Automation
Computer is an automatic machine.
Automation is the ability to perform a given task automatically. Once the computer
receives a program i.e., the program is stored in the computer memory, then the
program and instruction can control the program execution without human interaction.
Reduction in Paper Work and Cost
The use of computers for data processing in an organization leads to reduction in paper
work and results in speeding up the process.
, As data in electronic files can be retrieved as and when required, the problem of
maintenance of large number of paper files gets reduced.
Though the initial investment for installing a computer is high, it substantially reduces
the cost of each of its transaction.
Disadvantages of Computers: -
Following are certain disadvantages of computers.
No I.Q.
A computer is a machine that has no intelligence to perform any task.
Each instruction has to be given to the computer.
A computer cannot take any decision on its own.
Dependency
It functions as per the user’s instruction, thus it is fully dependent on humans.
Environment
The operating environment of the computer should be dust free and suitable.
No Feeling
Computers have no feelings or emotions.
It cannot make judgment based on feeling, taste, experience, and knowledge unlike
humans.
Components of Computers: -
All types of computers follow the same basic logical structure and perform the following five
basic operations for converting raw input data into information useful to their users.
S.No. Operation Description
The process of entering data and instructions into the computer
1 Take Input
system.
Saving data and instructions so that they are available for
2 Store Data
processing as and when required.
Processing Performing arithmetic, and logical operations on data in order to
3
Data convert them into useful information.
Academic Session 2022-2023
Semester I
Bridge Course Study Material
Today’s world is an information-rich world and it has become a necessity for everyone to
know about computers.
Definition: -
A computer is an electronic data processing device, which accepts and stores data input,
processes the data input, and generates the output in a required format.
Functionalities of a Computer
If we look at it in a very broad sense, any digital computer carries out the following five
functions −
Step 1 − Takes data as input.
Step 2 − Stores the data/instructions in its memory and uses them as required.
Step 3 − Processes the data and converts it into useful information.
Step 4 − Generates the output.
Step 5 − Controls all the above four steps.
Advantages of Computers
Following are certain advantages of computers.
High Speed
Computer is a very fast device.
It is capable of performing calculation of very large amount of data.
The computer has units of speed in microsecond, nanosecond, and even the picosecond.
It can perform millions of calculations in a few seconds as compared to man who will
spend many months to perform the same task.
Accuracy
In addition to being very fast, computers are very accurate.
, The calculations are 100% error free.
Computers perform all jobs with 100% accuracy provided that the input is correct.
Storage Capability
Memory is a very important characteristic of computers.
A computer has much more storage capacity than human beings.
It can store large amount of data.
It can store any type of data such as images, videos, text, audio, etc.
Diligence
Unlike human beings, a computer is free from monotony, tiredness, and lack of
concentration.
It can work continuously without any error and boredom.
It can perform repeated tasks with the same speed and accuracy.
Versatility
A computer is a very versatile machine.
A computer is very flexible in performing the jobs to be done.
This machine can be used to solve the problems related to various fields.
At one instance, it may be solving a complex scientific problem and the very next
moment it may be playing a card game.
Reliability
A computer is a reliable machine.
Modern electronic components have long lives.
Computers are designed to make maintenance easy.
Automation
Computer is an automatic machine.
Automation is the ability to perform a given task automatically. Once the computer
receives a program i.e., the program is stored in the computer memory, then the
program and instruction can control the program execution without human interaction.
Reduction in Paper Work and Cost
The use of computers for data processing in an organization leads to reduction in paper
work and results in speeding up the process.
, As data in electronic files can be retrieved as and when required, the problem of
maintenance of large number of paper files gets reduced.
Though the initial investment for installing a computer is high, it substantially reduces
the cost of each of its transaction.
Disadvantages of Computers: -
Following are certain disadvantages of computers.
No I.Q.
A computer is a machine that has no intelligence to perform any task.
Each instruction has to be given to the computer.
A computer cannot take any decision on its own.
Dependency
It functions as per the user’s instruction, thus it is fully dependent on humans.
Environment
The operating environment of the computer should be dust free and suitable.
No Feeling
Computers have no feelings or emotions.
It cannot make judgment based on feeling, taste, experience, and knowledge unlike
humans.
Components of Computers: -
All types of computers follow the same basic logical structure and perform the following five
basic operations for converting raw input data into information useful to their users.
S.No. Operation Description
The process of entering data and instructions into the computer
1 Take Input
system.
Saving data and instructions so that they are available for
2 Store Data
processing as and when required.
Processing Performing arithmetic, and logical operations on data in order to
3
Data convert them into useful information.
