A computer is an electronic device that accepts inputs, performs mathematical and logical operations using stored programs, and generates outputs. It has the characteristics of speed, accuracy, and automation as it can process millions of instructions per second with accurate results requiring little human intervention. While computers are diligent, reliable due to built-in monitoring, and versatile in running diverse applications, they are limited in only being able to perform programmed instructions and having limited use where qualitative considerations are important. Data represents known recorded facts and values, while information involves conclusions drawn from processing data.

1. 1
Data & Information (1)

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Computer
“Computer” derived from ‘compute’
It is an electronic device that
 Accepts inputs
 Performs mathematical and logical operations
 Uses stored programs for processing
 Generates outputs
It can perform diverse functions with the
help of programs ( software)

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Characteristics of computers
Speed
 Processes millions of instructions per second
Accuracy
 Accurate results when given correct
instructions and data
Automation
 Very little human intervention required

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Characteristics of computers (2)
Diligence
 No tiredness
Reliability
 Built-in continuous monitoring
Storage capability
 Secondary storage devices

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Versatility
 Can run diverse applications
Resource sharing
 Device sharing
 Information sharing
Characteristics of computers (3)

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Limitations of Computers
Can perform only what it is programmed to
do
Needs well defined instructions
Limited use in areas where qualitative
considerations are important

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Data & Information
Data
 A set of known facts that can be recorded and
have some meaning
 Represented by values
 Eg. Names, marks, images, sounds
Information
 Conclusion drawn from processing data
 Eg. Average marks