What is computer ? Function of Computer


13 May 2020    |    835 views

The term "Computer" is derived from a Latin word “computare” which means to “to calculate” , “to count” , “to sum up” or “to think together”. So, more precisely the word computer means a "device that performs computation".

COMPUTER stands for Common Operating Machine Purposely Used for Technological and Educational Research.

OR

C = Common
O = Operating
M = Machine
P = Purposely
U = Used for
T = Technological and
E = Educational
R = Research

A computer is a fast electronic device that processes the input data according to the instructions given by the programmer/user and provides the desired information as output.

Computer is the combination of Hardware and Software which convert data into information.

Use a computer to type documents, send email, browse the internet, handle spreadsheets, accounting, database management, presentations, games etc.

 

Function of Computer

Computer is responsible for performing four basic function :
Input : Information or data that is entered into a computer is called input. It sends data and instructions to the Central Processing Unit (CPU).
Processing : It is the sequence of actions taken on data to convert it into information which is meaningful to the user. It can be calculations, comparisons or decisions taken by the computer.
Output : It makes processed data available to the user.
Storage : It stores data and programs permanently.

Terms and Meaning
Hardware : Hardware is the collection of physical elements that constitute a computer system. It is a comprehensive term for all the physical parts of a computer. e.g., display screens, disks, keyboards. mouse, printers, scanner, chips, etc.
Software : It is a set of programs and procedures. Software tells the hardware what to do and how to accomplish a task. e.g., web browsers, word processors, etc.
Data : Unprocessed raw facts and figures, like numbers, text on pieces of paper, are known as data
Information : Data which has some meaning or value, then it is called information.
Instruction : It is a command given to a computer in the computer language by the user, then it is called instruction.
Program : It is a set of instructions given to a computer in order to perform some task.
Process : Manipulation of data.

 


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