Presentation on theme: "DATA PROCESSING SYSTEMS"— Presentation transcript:
1DATA PROCESSING SYSTEMS All Rights Reserved:ATENEO COMPUTER SCIENCE CENTERAteneo de Davao University
2Outline Data Processing System (DPS) Data, Information, ProgramsDefinition and Objective of DPSElements of a DPSTypes of data processing systemsElectronic Data Processing System (EDPS)3 Components of an EDPSAdvantages/Disadvantages of an EDPS
3Dataare facts, set of symbols to represent objects, events, activities and quantitiesBasic Forms of Data:Text consist of standard alphabetic, numeric and special charactersGraphics still pictures such as drawings, graphs, images and illustrationsAudio any type of soundVideo consist of motion pictures
4Information data that has been processed into a meaningful form 4 characteristics:AccurateTimelyCompleteRelevant
5Programsset of instructions that tells the computer how to process the data to produce information that the user wantsInstructions that causes the computer to perform specific actions
6Data Processing System Data – are facts, set of symbols to represent objects, events, activities and quantitiesProcess – the execution of various operations on data to convert it to a form which is meaningfulSystem – a collection of components that interact to serve a common goalObjective:To convert raw data into information that can be used in decision making
7Elements of a DPS Input Processing Output Storage collection of data/information and conversion into a form acceptable for processingProcessingapplication of operations that convert data into a meaningful formOutputthe form that is acceptable to the user for analysis or as input for a second cycleStoragethe medium where you can keep both data and information for future reference or retrieval
8Types of Data Processing Manual Data Processingis done by people with or without the aid of machines. These machines are typewriters, calculator, adding machine, etc..Electronic Data Processingis done exclusively by machines with minimal human supervision. Electronic devices are used such as computers to produce information.
9Electronic Data Processing 3 ComponentsHardware – physical componentsphysical equipment in a computing environmentSoftware – conceptual componentsmachine codes and computer programsbuilt from planning and knowledgePeopleware – human componentspersonnel involved in the systemhighly specialized personnel with computer skills
10Physical Components: HARDWARE For INPUT:KeyboardMouseVideo cam
11Physical Components: HARDWARE For PROCESS:SYSTEM UNITCPUmemorydisk drives
12Physical Components: HARDWARE For OUTPUT:Display (soft-copy)Printer (hard-copy)Multi-media speakers
13Physical Components: HARDWARE For STORAGE:floppy disksfixed diskCDCD RW
14Conceptual Components: SOFTWARE Applications SoftwareComputer programs that provide tools for performing the type of work that people require computer systems to do; commonly called applications programs or applications.Productivity Software – a computer programs such as word processors and spreadsheets, designed to make workers more productive in their jobs.Entertainment Software – a computer program that plays movies, music and games.Educational Software – a computer program that aids on education such as tutorials.
15Conceptual Components: SOFTWARE Systems SoftwareComputer programs that enable application programs to run on a given set of hardware.Operating System - the main collection of systems software that enables the computer system to manage the resources under its control.Personal Operating System - MS-DOS & PCDOSNetwork Operating Systems - an operating system that enables the network administrator in an organization to control network tasks.Language Translators - systems software that converts applications programs into a machine language.
16Areas of the EDP Department SYSTEMS AND PROCEDURESdefining and developing the system which will be implemented on the company’s hardware.design of systems, impetus for designing new systemsserves as the liaisons between users and the other departmentsSystems Analystplanning and design of new applicationsProgrammer Analystprogramming and designing a system
17Areas of the EDP Department PROGRAMMING AREAresponsible for all programming activitiesupdating and maintaining systems which have already been programmedadvisers to SYSTEMS & PROCEDURES area on any programming area that might occur in systems designApplications ProgrammersMaintenance ProgrammersSystem Programmers
18Areas of the EDP Department Applications ProgrammersThey are provided with the requirements of a job and are asked to develop logic and then code, debug and document a programMaintenance ProgrammersResponsible for revising, amending or updating existing programs. They are the “trouble shooters” (finding and fixing errors in existing software)System ProgrammersThey are highly skilled programmers which are responsible for maximizing the overall efficiency of a computer system
19Areas of the EDP Department OPERATIONScontrols all of the day-to-day activities which take place within the data processing department.Data Preparation StaffComputer OperatorFile LibrarianAuditorDatabase Administrator
20Areas of the EDP Department Data Preparation StaffConverts data into codes (coding clerk)Converts data into a form said to be computer readable (data encoders)Computer OperatorPrepares data for processingFile LibrarianTakes care of the inventory of records, disks and other file media (issues, receipts and storage of files)
21Areas of the EDP Department AuditorAccounting and computer specialists who are responsible for assessing the effectiveness and efficiency of the computer systemData Base AdministratorResponsible for organizing a large volume of data such as the database of an organization
23ADVANTAGES increased speed improved accuracy and reliability more effective control (error-checking, reports)reduced coststorage capacityimproved quality
24DISADVANTAGES relatively high cost of equipment cost and difficulty of systems design and programmingchannelling of workproblems of conversion from a manual system to an electronic onesecurity problems