PowerPoint PresentationObjectivesSystems SoftwareFour Kinds of ProgramsOperating SystemsCategories of OSMajor OSUtilitiesEssential UtilitiesUtility SuitesDevice driversLanguage translatorsA Look to the FutureSlide 143333CHAPTERSystem Software© The McGraw-Hill Companies, Inc. 2002 33Objectives •System software•Programs, Functions, Categories•Utilities•Device drivers•Language translators© The McGraw-Hill Companies, Inc. 2002 33Systems Software•Behind the scenes activities•Designed to handle–Technical details–Where programs stored–How commands executed–Where files saved–How output handled© The McGraw-Hill Companies, Inc. 2002 33Four Kinds of Programs•Operating system•Utilities•Device drivers•Language translators© The McGraw-Hill Companies, Inc. 2002 33Operating Systems–Coordinates resources–Provides user interface –Run applications© The McGraw-Hill Companies, Inc. 2002 33Categories of OS•Hundreds of operating systems•Three basic categories–Embedded – hand-held–Network OS – linked computers–Stand-alone OS – desktop© The McGraw-Hill Companies, Inc. 2002 33Major OS•Windows – 80% of market•Mac OS – powerful and easy to use•UNIX – network; originally designed for Web•LINUX – non proprietary; free off Web© The McGraw-Hill Companies, Inc. 2002 33Utilities–Hard disk crashes–Antivirus programs–Computer freeze-ups–Decrease operation slow-downs© The McGraw-Hill Companies, Inc. 2002 33Essential Utilities•Troubleshooting•Antivirus•Uninstall•Backup•File compression© The McGraw-Hill Companies, Inc. 2002 33Utility Suites•Norton•McAfee•DataFellows© The McGraw-Hill Companies, Inc. 2002 33Device drivers•Specialized programs•Loaded into memory each time•Add new device: install device driver33Language translatorsprogramming language into computer language© The McGraw-Hill Companies, Inc. 2002 33A 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© The McGraw-Hill Companies, Inc. 2002