1. CSE 101 Spring 2000 Operating Systems

2. The Tasks of the Operating System Single Task Multitasking

3. Types of Software Systems Software  Controls the operation of the computer  I.e. Microsoft Windows, Mac OS Unix Development Software  Used to write update and maintain other programs, I.e. programming languages Application Software  allows computer to perform specific tasks like Microsoft Word, Excel, etc...

4. What Happens When You Boot? 1. Check for Required hardware 2. RAM Check 3. Port and hard drive check 4. Load Kernal of the operating system  The Kernal is “resident” in the memory the entire time the computer is running. 5. Operating systems loads and executes startup files

5. Who’s Driving?!? Each device attached to your computer must have a driver. Plug & Play (Plug & Pray) Look on the WWW for updated drivers

6. Tasks of the OS Coordinate system resources, manages memory, controls and enables all input and output processes and protects program and data instructions loaded in memory. File structure and management

7. Memory Management RAM has limited space foreground and background jobs virtual memory pages swapping

8. More on OS I/O Management  Print Jobs  Spooling through the mailq Data/Program Protection  Memory Protection  Account protection

9. User Interface CUI (Command-based User Interface)  command prompt  character menu GUI (Graphical User Interface)  pull-down menus  icons  pointing devices  windows

10. Operating Systems Proprietary  machine dependent  written by computer manufacturer for a specific machine Portable  machine independent

11. Operating Systems Unix (LINUX on PC) Widows 3.1, 95, 98, CE, NT, 2000, Millennium MAC OS

12. Applications Business  Word processing, spread sheets, databases and presentation software, bookkeeping  Integrated Packages Graphic Arts  Desktop publishing, photo manipulation, CADD Internet applications Sound and video manipulation Games and more...

13. Shareware and Freeware Shareware is often crippled in some way (crippleware) Shareware is a free trial. The company who makes the software wants your money. Freeware is free!

14. Software, etc... Bugs Where are we going?