Short note :- Definition of Computer
Today’s world is an information rich world and it has become a necessity for everyone to know about computers.
In 1640s, Computer term was first used as “one who calculates.” From 1897, term changed and got a new computer meaning “Calculating machine“. From 1945 the term indicates as “programmable digital electronic computer“.
The word compute is derived from the Latin word ‘computare’, was meaning “arithmetic, accounting”.
The Computer meaning is the digital device that stores information in memory using input devices and manipulate information to produce output according to given instructions.
The actual machinery, the physical parts of a computer system refer to as Computer hardware; the instruction (a program) that tells the computer what to do or how to do, that is called Computer software (often called just software).
Computer Meaning in general term
Technically, a computer means to calculate or electronic programmable machine.
Computer is used to perform some sequence of instructions in fast and accurate manner. Computer receives input in the form of digitized data, using input devices like keyboard, mouse, joystick, scanner etc. It process based on a program instructions to give output.
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.
【 Do you know the full form of computer? 】
~~~~~~~|||~~~~~|||~~~~~~
Write a short note :-
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.
Write a short note :-
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.
