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Computer Organization - 3
Operating systems, Application
software
Define Operating System
• runs a computer
• Delegates all the tasks to different hardware
and software
• It also serves as a user interface
Functions of an operating system
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Manages input and output operations
It monitors the hardware, cpu usage
Provides a user interface
It allocates resources for various processes
Memory management
File management
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Different operating systems
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Windows
OS X
Linux
Solaris
Android
iOS
Different devices, different hardware, varying
needs, single user, multi user, networked
Utility software
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Disk defrag
Anti virus
Disk cleaners
Backup utilities
compression
Application software
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Word processors
Spread sheets
Data base management
CAD
Web browsers
Email clients
Power point
Photo editors
Movie makers
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Common features of Application
software
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User interface
Saving data
Retrieve data
Tool bars
Menus
Dialogue boxes
End of class tasks
• Class discussion: Social issues #1,3 on page 136.
• Individual work: Read pages 110 - 121