Systems software and security

Systems software and security

1. Operating system software

   • Some operating systems
     • Android OS
       • Jelly Bean
       • Kit Kat
     • OS X (Apple MACs)
       • Mountain Lion
       • Snow Leopard
     • iOS (iPhone/iPad)
     • MS-DOS and Windows
     • Linux
     • Google Chrome OS (based on Linux)
   • Functions of an operating system
     • Provides a user interface
     • Manages
       • memory
       • multitasking
       • peripherals
       • files
       • user access rights
   • Types of User Interface
     • Graphical User Interface GUI
       • Windows
       • Icons
       • Menus
       • Pointers
     • Menu-driven interface
     • Command Line Interface CLI
       • Just text, like Windows command prompt
     • Voice activated
     • Real-time
       • sensors detect inputs, actuators output actions