Computer - Data and Information

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.)

What is Information?

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.

Data Processing Cycle

Data processing is the re-structuring or re-ordering of data by people or machine to increase their usefulness and add values for a particular purpose. Data processing consists of the following basic steps - input, processing, and output. These three steps constitute the data processing cycle.

• Input − In this step, the input data is prepared in some convenient form for processing. The form will depend on the processing machine. For example, when electronic computers are used, the input data can be recorded on any one of the several types of input medium, such as magnetic disks, tapes, and so on.
• Processing − In this step, the input data is changed to produce data in a more useful form. For example, pay-checks can be calculated from the time cards, or a summary of sales for the month can be calculated from the sales orders.
• 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. For example, output data may be pay-checks for employees.

 _{See more on Computer Tutorial
Computer Overview}

Computer Fundamental Tutorial

Computer Application 

Computer - Generation

Computer - Type 
Computer - Components
Computer - CPU 
Computer - Input Devices
Output - Devices 

Computer - Memory 

Random Access Memory

Computer Read Only Memory
Computer - Motherboard 

Computer - Memory - Unit

Computer - Port 
Computer - Hardware
Computer - Number System 

Computer - Software

Computer - Number System Conversion
Computer - Data and Information  

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