1. What is O.S Introduction to an Operating System OS Done by: Hani Al-Mohair

2. Objectives Describe the differences between system software and application software Discuss the four types of system software Discuss operating systems Describe Windows, Mac, OS, UNIX, & Linux

3. Done by: Hani Al-Mohair cont. Describe the purpose of utilities and utility suites Identify the five most essential utilities Discuss Windows utility programs Describe the device drivers including printer drivers

4. Done by: Hani Al-Mohair Handles technical details Works with end users, application software, and computer hardware. System software controls where a word processing program is stored in memory. How commands are converted so that the system unit can process Them.  How the output is printed. cont.

5. What is an O/S? O/S is a program that performs 4 basic functions:  Communicate with hardware  Provide a user interface  Allow users to manipulate programs and data  Provide a means for the user to run, use and shut down applications

6. Software Programs Instructions Two major kinds of software  System Software  Application Software

7. System Software A collection of programs Enables the application software to interact with the hardware Background software that helps the computer manage its own resources

8. Four types of programs  Operating system: programs that coordinate computer resources, provide a user interface and run applications.  Utilities( service programs): perform specific tasks to managing computer resources.  Device drivers: allow I/O devices to communicate with the rest of the computer system.  Language translators: convert the programming instruction into a language that computer understand and process. System Software cont.

9. Operating Systems A collection of programs that handles technical tasks Every computer has an operating system Performs three types of functions  Manages computer resources  Provides user interface  Runs applications

10. Operating System cont Recourses: memory, HDD, printer User interface: old OS used character based interface. applications

11. Features of an Operating System Booting

12. Booting cont Warm boot: computer already on Cold boot: start computer that has been turned off

13. Features of an operating system Features in common with application software Icons Pointers Windows Menus Dialog boxes Provide information or request input Help

14. Categories of Operating Systems Hundreds of operating systems Three basic categories  Embedded – hand-held Or small devices like PDA’s OS stored in ROM Palm OS or windows CE  Network OS – linked computers Windows NT server, UNIX, Z/OS http://www-03.ibm.com/servers/eserver/zseries/zos/  Stand-alone OS – desktop

15. More on Operating Systems OS often called software environment or platform Operating systems commonly used by individuals  Mac OS – powerful and easy to use  UNIX – network; originally designed for Web  LINUX –free off Web

16. Windows The most popular microcomputer operating system Comes in a variety of different versions Windows VISTA is the latest version

17. Windows History