1. Information Technology Foundation Dr. Robert Chi Chair and Professor, IS department Chief editor, Journal of Electronic Commerce Research

2. Types of Data Numbers –Decimal System –Hex decimal System –Binary System Text –ASCII (American Standard Code for Information Interchange) –EBCDIC (Extended Binary Coded Decimal Interchange Code) –Unicode Pictures –Bitmap Resolution: pixels GIF: only 256 colors JPEG: photos PNG –Vector format Smooth edges Less storage, fast transfer, scalable

4. Sound –Volume (amplitude) –Pitch (frequency) –Storage method MP3, MP4 MIDI (Musical Instrument Data Interchange) Video A CD stores 700 megabytes, 72 minutes of music Digital telephone: 64 k per minute Video : 3 mega per minute

5. Hardware Components Processor –The evolution of Processors –Moor’s law –Clock, word size, bus –Cache, RAM –Parallel processing Input Output

6. Secondary Storage –Tape –Floppy –HD –USB –CD: 700 Mega –DVD 5-9 Giga

7. Operating Systems –Windows –Unix –Linux –Solaris

8. Paperless More information is available for users to print Low resolution display devices Portability Battery Life

9. Application Software –MS office –Database (DBMS) –ERP (enterprise resources Planning) systems