1. 3 3 3 CHAPTER System Software

2. 3 © The McGraw-Hill Companies, Inc. 2002 Objectives System software Programs, Functions, Categories Utilities Device drivers Language translators

3. 3 © The McGraw-Hill Companies, Inc. 2002 Systems Software Behind the scenes activities Designed to handle –Technical details –Where programs stored –How commands executed –Where files saved –How output handled

4. 3 © The McGraw-Hill Companies, Inc. 2002 Four Kinds of Programs Operating system Utilities Device drivers Language translators

5. 3 © The McGraw-Hill Companies, Inc. 2002 Operating Systems –Coordinates resources –Provides user interface –Run applications

6. 3 © The McGraw-Hill Companies, Inc. 2002 Categories of OS Hundreds of operating systems Three basic categories –Embedded – hand-held –Network OS – linked computers –Stand-alone OS – desktop

7. 3 © The McGraw-Hill Companies, Inc. 2002 Major OS Windows – 80% of market Mac OS – powerful and easy to use UNIX – network; originally designed for Web LINUX – non proprietary; free off Web

8. 3 © The McGraw-Hill Companies, Inc. 2002 Utilities –Hard disk crashes –Antivirus programs –Computer freeze-ups –Decrease operation slow- downs

9. 3 © The McGraw-Hill Companies, Inc. 2002 Essential Utilities Troubleshooting Antivirus Uninstall Backup File compression

10. 3 © The McGraw-Hill Companies, Inc. 2002 Utility Suites Norton McAfee DataFellows

11. 3 © The McGraw-Hill Companies, Inc. 2002 Device drivers Specialized programs Loaded into memory each time Add new device: install device driver

12. 3 Language translators programming language into computer language

13. 3 © The McGraw-Hill Companies, Inc. 2002 A Look to the Future IBM concentrating research efforts on eLiza: –Handle time-consuming maintenance –Create complex infrastructure Self-maintaining servers –Able to care for themselves

14. 3 © The McGraw-Hill Companies, Inc. 2002 Questions / Comments Thank U