1. 27 March 2001 wichai@bucc4.buu.ac.th1 310443 Management Information Systems 3. Introduction to Information Systems Technology by Asst. Prof. Wichai Bunchua E-mail : wichai@bucc4.buu.ac.th http://docsavage.compsci.buu.ac.th/~wichai/3 10443 http://www.sci.buu.ac.th/~wichai

2. 27 March 2001wichai@bucc4.buu.ac.th2 OverviewOverview The evaluation of information systems technology Computer hardware Programs Data

3. 27 March 2001wichai@bucc4.buu.ac.th3 The evolution of Information Systems Technology Origins The first generation The second generation The third generation The fouth generation Information systems today

4. 27 March 2001wichai@bucc4.buu.ac.th4 Computer Hardware Input hardware Processing hardware Storage hardware Output hardware

5. 27 March 2001wichai@bucc4.buu.ac.th5 Input Hardware Keyboard Terminals Mouse Scanner Voice input OCR Barcode reader

6. 27 March 2001wichai@bucc4.buu.ac.th6 Processing Hardware CPU charateristics System memory Data bus or processor channel Three categories of processing hadware: Mainframe computer, Mini computer, Microcomputer Processor archtecture

7. 27 March 2001wichai@bucc4.buu.ac.th7 Storage Hardware Disk storage Diskettes or floppy disks Hard disks Tape storage Optical storage CD-ROM WORM Erasable optical disks

8. 27 March 2001wichai@bucc4.buu.ac.th8 Output Hardware Printers Character printers, line printers, and page printers Impact printers and nonimpact printers Video displays Voice output

9. 27 March 2001wichai@bucc4.buu.ac.th9 ProgramsPrograms Two major groups of programs Systems programs Application programs Programming Languages

10. 27 March 2001wichai@bucc4.buu.ac.th10 Systems programs Operating System Utility Programs Communcations control programs

11. 27 March 2001wichai@bucc4.buu.ac.th11 Application Programs Horizontal market application programs Vertical Market Application Programs Custom-Developed Application programs

12. 27 March 2001wichai@bucc4.buu.ac.th12 Programming Languages Machine languages Assembly languages High level languages Nonprocedural languages

13. 27 March 2001wichai@bucc4.buu.ac.th13 DataData Data representation File processing Sequential file organzation Direct-access file organization Problems with file processing Database processing

14. 27 March 2001wichai@bucc4.buu.ac.th14 Data Representation Bits Bytes Charater codes ASCII EBCDIC Fields or data items Records Files