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# Lesson 2 data processing

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• 1. Data Processing
Lesson 2
• 2. 2 – 1 AREAS OF DATA PROCESSING
Scientific Data Processing
2 – 2 DATA PROCESSING OPERATIONS
Recording
Verifying
Duplicating
Classifying
Calculating
• 3. Calculating
Summarizing and Reporting
Merging
Storing
Retrieving
Feedback
• 4. 2-3 METHODS OF PROCESSING DATA
Batch Processing
On-line Processing
Real-time Processing
Distributed Processing
• 5. 2-1 AREAS OF DATA PROCESSING
It is characterized by the need to establish , retain, and process files of data for producing useful information.
It involves a large volume of input data ,limited arithmetical operations
and relative large volume of output.
• 6. 2-1 AREAS OF DATA PROCESSING
Scientific Data Processing ( SDP)
In science, data processing involves a limited volume of input and many logical or arithmetic calculations.
• 7. 2-2 Data Processing Operations
Recording – refers to the transfer of data unto some form or document. It relates to the documentation of intermediate figures and facts resulting from calculations
Verifying – the checking of any possible errors in the recorded data.
• 8. 2-2 Data Processing Operations
Duplicating – reproducing the data unto many forms of documents.
Classifying – identifying and arranging items with like characteristics into groups or classes .
Sorting – arranging data in a specific order
Calculating – the arithmetic manipulation of data.
Summarizing and Reporting
• Summarizing – reducing masses of data to a more usable form.
• Merging – this operation takes two or more sets of data and puts them together to form a single sorted set of data.
Storing – placing similar data into files for future reference .
Retrieving – recovering stored data and / or information when needed.
Feedback – is the comparison of the output and the goal set in advance; any discrepancy is analyzed, corrected and fed back to the proper stage in the processing operation.
• 9. 2- 3 Methods of Processing Data
Batch Processing – is a technique in which data to be processed or program to be executed are collected into groups to permit convenient, efficient and serial processing.
On-line Processing - in one which uses devices directly connected to the CPU either for data entry or inquiry purposes.
• 10. 2- 3 Methods of Processing Data
Real-time processing is a method of data processing which has the capability of a fast response to obtain data from an activity or a physical process , performs computations and return a response rapidly enough to affect the outcome of the activity or process.
Distributed Processing is the most complex level of computer processing which generally consists of remote terminals linked to a large central computer system to help the user conduct inquiries about accounts , process jobs or other data processing operations
• 11. Advantages of distributed processing system
Central processor time is reduced
Sophisticated computers and a growing library of applications program may be immediately available to end users whenever needed
Skilled professionals are available to help users develop their own specialized applications
Managers may be able to react rapidly to new development and interact with the system in order to seek solutions to unusual problems.