Introduction of Computer | SBI PO Prelims & Mains Preparation - Bank Exams PDF Download

A computer is a machine or device that performs processes, calculations and operations based on instructions provided by a software or hardware program. It is designed to execute applications and provides a variety of solutions by combining integrated hardware and software components.
In general a machine which has capability to store large data value in its memory. It works using input (like keyboard) and output (like printer) devices. ... It allows us to make changes in the already stored data as well as store new data.
Data can be defined as a representation of facts, concepts, or instructions in a formalized manner, which should be suitable for communication, interpretation, or processing by human or electronic machine.
Data is represented with the help of characters such as alphabets (A-Z, a-z), digits (0-9) or special characters (+,-,/,*,<,>,= etc.)
Information is organized or classified data, which has some meaningful values for the receiver. Information is the processed data on which decisions and actions are based

For the decision to be meaningful, the processed data must qualify for the following characteristics −
Timely − Information should be available when required.

Accuracy − Information should be accurate.

Completeness − Information should be complete.

Input − In this step, the input data is prepared in some convenient form for processing. The form will depend on the processing machine.
Processing − In this step, the input data is changed to produce data in a more useful form.
Output − At this stage, the result of the proceeding processing step is collected. The particular form of the output data depends on the use of the data.

Full form of computer

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