Operating Systems

Operating Systems

1. Functions

   • Controls the system hardware resources
   • Manages flow of data
     • It controlls whether data is displayed as output or stored
     • Within the system and in storage devices
   • Controls communucation with peripherals such as keyboard and mouse
   • Translates code
     • Compiler
     • Interpreter
   • Utility Programs
     • Formatting
     • Clean up Tools
     • Security software
       • Prevents conflicts between main memory and CPU so no data loss

2. Provides an Interface

   • HCI (Human Computer Interface)
     • Lets user control the OS
   • GUI (Graphical User Interface)
     • Allows user to interact with system with graphical icons
   • Command Line Interface
     • Allows user to type in commands for the computer

3. Examples

   • Mobile OS
     • iOS
     • Android
     • Java ME
     • Symbian
     • Blackberry
   • Desktop OS
     • Windows 7
     • OS X
     • Linux
     • Windows XP
     • Windows 8
     • Windows Vista