2. 2.2 Types of Computer Software Prepared by Desmond C.S. Wong

3. Operating System An OS is a program (some may say a set of programs) that coordinates all the activities of a computer

4. Microsoft Windows XP from Amazon.com

5. Apple Mac OS X from Apple Computer

6. Redhat Linux from computerworld.jp

7. Linux command-mode from rr.sans.org

8. Sun Solaris Unix from xfce.org

9. Microsoft DOS from members.tripod.com/suzuki2go

10. Microsoft Windows DOS Prompt

11. Starting a computer POWER 1. Turn on the power

12. 2. The processor finds the ROM chip that contains the BIOS from rojakpot.comfrom dualprocessorcomputers.com

13. 3. The BIOS performs POST from dn.redwoods.cc.ca.us

14. from wown.info

15. 4. The results of the POST are compared with data in the CMOS chip from nuwaveinc.com = ?

16. 5. The BIOS looks for the system files in one of the booting drives from all-about-pc.de

17. 6. the system files and the # kernel of the OS load into RAM from hard disk/booting drive from macaddit.com 1001 1010 1011 1100 1101 … from Amazon.com

18. 7. the OS loads configuration information and displays the interface on the screen

19. Functions of OS User interface Job scheduling Program management  Single user/single tasking  Multitasking  Multi-user  Multiprocessing Data management Device management Security of access Resources management Error detection and response

20. Types of OS Standalone  MS-DOS, Windows 9X, Windows NT Workstation, Windows 2000 Prof, Windows ME, Windows XP Home & Prof. Ed., MacOS Network  Netware, Windows NT and 2000 Server, Windows.NET Server, UNIX, Linux Embedded  Windows CE, Pocket PC 2002, Palm OS

21. Utility programs A utility program is a type of system software that performs a specific task, usually related to managing a computer, its devices, or its programs

22. Applications software Application software consists of programs that perform specific tasks for users  Word processing  Spreadsheet software  Database software  Presentation graphics software  Game  Desktop publishing software  Anti-virus scanner  Web browser  and etc.

23. Forms of applications software Packaged software Custom software Freeware Public domain software Shareware Software from ASP

24. Data files Text document  txt, rtf, doc, pdf Image files  bmp, gif, jpeg, png, tiff Sound files  midi, mp3, ra, wav Video files  avi, mov, mpeg, rm Presentation files  ppt Spreadsheet files  xls Database files  dbf, mdb

25. Relationship among OS, applications s/w and data files User Application Software Operating System Data Files

26. http://www.med.yale.edu/caim/manual/graphics/graphics/8bit_displays.gif http://www.med.yale.edu/caim/manual/graphics/graphics/1_bit_display.gif