Chapter 5 :System Software
System Software
• Handles technical details
• Works with end users, application software, and computer hardware
Functions of an Operating System
Features of an Operating System
• Booting
• Features in common with application software
– Icons
– Pointers
– Windows
– Menus
– Dialog boxes
– Help
Categories of Operating Systems
• Hundreds of operating systems
• Three basic categories
– Embedded operating systems – hand-held
– Network operating systems – linked computers
– Stand-alone operating systems – desktop
More on Operating Systems
• OS often called software environment or platform
• Operating systems commonly used by individuals
– Windows – most widely used
– Mac OS – powerful and easy to use
– UNIX – network; originally designed for Web
– LINUX – non proprietary; free from the Web
Windows
• The most popular microcomputer operating system – over 90 percent of the market
• Comes in a variety of different versions
• Windows 7 provides several improvements over Windows Vista
UNIX and LINUX
• UNIX operating system
– Originally designed to run on minicomputers on a network
– Used by powerful microcomputers
• LINUX is a version of UNIX
– Not proprietary
– Open source
Virtualization
• Ability to support multiple operating systems on a single physical machine
• Virtualization software
– Physical machine can be logically separated into separate and independent virtual computers called virtual machines
-Host operating system
- Guest operating system
Utilities
Windows Utilities
Utility Suites
• A group of several utility programs bundled for sale
• Buying the package is economical
• Popular suites
– Norton System Works
– McAfee Office
– V Communications
SystemSuite
SystemSuite
Careers In IT
• Computer support specialist provide technical support to customers and other users
• Resolve common networking problems and use troubleshooting programs to diagnose problems
• Employers look for a bachelors degree, good analytical and communication skills
• Computer support specialist
can expect to earn $32K - $53K annually
A Look to the Future
IBM's Aware Supercomputer
• IBM’s Automatic Computing Initiative (ACI)
– Handles time-consuming maintenance
– Self-regulating and virtually invisible
• Self-maintaining servers
– Self-repairing
– Self-updating
– Self-protecting
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