What Is Data

Numbers, characters, images, or other method of recording, in a form which can be assessed by a human or (especially) input into a computer, stored and processed there, or transmitted on some digital channel. Computers nearly always represent data in binary
Data on its own has no meaning, only when interpreted by some kind of data processing system does it take on meaning and become information.

People or computers can find patterns in data to perceive information, and information can be used to enhance knowledge. Since knowledge is prerequisite to wisdom, we always want more data and information.


1234567.89 is data.
"Your bank balance has jumped 8087% to RM1234567.89" is information.

"Nobody owes me that much money" is knowledge.

"I'd better talk to the bank before I spend it, because of what has happened to other people" is wisdom.

What Is Data Communication?

The transfer of data from one machine to another machine such that the sender and receiver both interpret the data correctly.
The exchange of data between two devices via some medium.
Communication include telephony, telegraphy, television which means communicating at a distance.
In computer information system data are represented by binary information or bits
( 0 ‘s & 1 ‘ s )