1. Introduction to Information Technology László Kajdocsi Department of Information Technology

2. Etymology  INFORMATION Information refers to the knowledge obtained from reading, study or research. Information is knowledge and helps us to fulfil our daily tasks.  TECHNOLOGY Technology is the use of scientific knowledge, experience and resources to create products that fulfil human needs.

3. Eras of Information Technology 4 main ages divide up the history of information technology:  Premechanical (3000B.C. - 1450A.D.)  Mechanical (1450 - 1840)  Electromechanical (1840 - 1940)  Electronic (1940 – present and beyond)

4. Data and information  Difference between data and information  Classify different types of data processed by computer  Function of the units of computer  How is data processed by computer?

5. Data vs. information Data unorganized facts that need to be processed can be useless until it is organized Information is organized and processed data has meaningful value for the receiver

6. Data and information Types of data:  Numeric  Text  Image  Audio  Video

7. Functional units of computer

8. Steps of data processing Collection Preparation Input Processing Output and interpretation Storage

9. Data storage  Primary storage (CPU registers, cache)  Secondary storage (hard disk, flash memory, CD, DVD)  Nearline storage (tape library)

10. Computer inputs  Keyboard  Mouse  Scanner  Touchscreen  Microphone  Joy stick  Bar code reader  Digitizer, etc.

11. Computer outputs  Monitor  Graphic plotter  Printer

12. Networks  Personal Area Network (PAN)  Local Area Network (LAN)  Metropolitan Area Network (MAN)  Wide Area Network (WAN)  Global Area Network (GAN)

13. Network topologies  Line network  Bus network  Star network  Ring network  Mesh network  Fully-connected network  Tree network

14. Computer software Operating systems DOS Windows Unix Linux MAC OS RTOS Programming languages Ada Basic C, C++, C# Cobol Fortran Java Pascal Python, etc.

15. Internet services  World Wide Web  Communication  Data transfer

16. Present and beyond  ICT  e-Marketing  e-Commerce  e-Learning  e-Health Care  e-Governance  Smart devices  Smart homes  Smart cities  Security systems  Global positioning  Autonomous vehicles

17. Impact of IT on society impact of IT on society FASTER COMMUNICATION SPEED LOWER COMMUNICATION COST RELIABLE MODE OF COMMUNICATION EFFECTIVE SHARING OF INFORMATION PAPERLESS ENVIRONMENT BORDERLESS COMMUNICATION SOCIAL PROBLEMS

18. Information Technology Information technology is a general term that describes any technology that help to produce, manipulate, store and communicate information. IT: One of the Fastest Growing Sector

19. Major research fields of future IT  E-Commerce  Enterprise Resource Planning  Supply Chain Management  IT Personnel Management: Careers & Competencies  Management of the Outsourcing of IT  Data mining, Data Modeling and Decision Support Systems  E-Government  Recommender systems  Virtual reality & 3D internet  Indoor positioning  Networking

20. Thank you for your attention!