1. DATA PROCESSING SYSTEMS
All Rights Reserved:
ATENEO COMPUTER SCIENCE CENTER
Ateneo de Davao University

2. Outline Data Processing System (DPS)
Data, Information, Programs
Definition and Objective of DPS
Elements of a DPS
Types of data processing systems
Electronic Data Processing System (EDPS)
3 Components of an EDPS
Advantages/Disadvantages of an EDPS

3. Data
are facts, set of symbols to represent objects, events, activities and quantities
Basic Forms of Data:
Text  consist of standard alphabetic, numeric and special characters
Graphics  still pictures such as drawings, graphs, images and illustrations
Audio  any type of sound
Video  consist of motion pictures

4. Information data that has been processed into a meaningful form
4 characteristics:
Accurate
Timely
Complete
Relevant

5. Programs
set of instructions that tells the computer how to process the data to produce information that the user wants
Instructions that causes the computer to perform specific actions

6. Data Processing System
Data – are facts, set of symbols to represent objects, events, activities and quantities
Process – the execution of various operations on data to convert it to a form which is meaningful
System – a collection of components that interact to serve a common goal
Objective:
To convert raw data into information that can be used in decision making

7. Elements of a DPS Input Processing Output Storage
collection of data/information and conversion into a form acceptable for processing
Processing
application of operations that convert data into a meaningful form
Output
the form that is acceptable to the user for analysis or as input for a second cycle
Storage
the medium where you can keep both data and information for future reference or retrieval

8. Types of Data Processing
Manual Data Processing
is done by people with or without the aid of machines. These machines are typewriters, calculator, adding machine, etc..
Electronic Data Processing
is done exclusively by machines with minimal human supervision. Electronic devices are used such as computers to produce information.

9. Electronic Data Processing
3 Components
Hardware – physical components
physical equipment in a computing environment
Software – conceptual components
machine codes and computer programs
built from planning and knowledge
Peopleware – human components
personnel involved in the system
highly specialized personnel with computer skills

10. Physical Components: HARDWARE
For INPUT:
Keyboard
Mouse
Video cam

11. Physical Components: HARDWARE
For PROCESS:
SYSTEM UNIT
CPU
memory
disk drives

12. Physical Components: HARDWARE
For OUTPUT:
Display (soft-copy)
Printer (hard-copy)
Multi-media speakers

13. Physical Components: HARDWARE
For STORAGE:
floppy disks
fixed disk CD
CD RW

14. Conceptual Components: SOFTWARE
Applications Software
Computer 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.

15. Conceptual Components: SOFTWARE
Systems Software
Computer 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 & PCDOS
Network 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.

16. Areas of the EDP Department
SYSTEMS AND PROCEDURES
defining and developing the system which will be implemented on the company’s hardware.
design of systems, impetus for designing new systems
serves as the liaisons between users and the other departments
Systems Analyst
planning and design of new applications
Programmer Analyst
programming and designing a system

17. Areas of the EDP Department
PROGRAMMING AREA
responsible for all programming activities
updating and maintaining systems which have already been programmed
advisers to SYSTEMS & PROCEDURES area on any programming area that might occur in systems design
Applications Programmers
Maintenance Programmers
System Programmers

18. Areas of the EDP Department
Applications Programmers
They are provided with the requirements of a job and are asked to develop logic and then code, debug and document a program
Maintenance Programmers
Responsible for revising, amending or updating existing programs. They are the “trouble shooters” (finding and fixing errors in existing software)
System Programmers
They are highly skilled programmers which are responsible for maximizing the overall efficiency of a computer system

19. Areas of the EDP Department
OPERATIONS
controls all of the day-to-day activities which take place within the data processing department.
Data Preparation Staff
Computer Operator
File Librarian
Auditor
Database Administrator

20. Areas of the EDP Department
Data Preparation Staff
Converts data into codes (coding clerk)
Converts data into a form said to be computer readable (data encoders)
Computer Operator
Prepares data for processing
File Librarian
Takes care of the inventory of records, disks and other file media (issues, receipts and storage of files)

21. Areas of the EDP Department
Auditor
Accounting and computer specialists who are responsible for assessing the effectiveness and efficiency of the computer system
Data Base Administrator
Responsible for organizing a large volume of data such as the database of an organization

22. Advantages and Disadvantages of the EDP System:

23. ADVANTAGES increased speed improved accuracy and reliability
more effective control (error-checking, reports)
reduced cost
storage capacity
improved quality

24. DISADVANTAGES relatively high cost of equipment
cost and difficulty of systems design and programming
channelling of work
problems of conversion from a manual system to an electronic one
security problems