Operating Systems

Operating Systems

1. Security

   • Part of the system involves protecting users, system resources and files
   • The OS ensures that data is not lost, corrupted or overwritten
   • Security on an OS makes sure the right user is looking at their data

2. Graphical User Interface

   • GUIs allow users to interact with the system using graphical icons and visual indicators

3. Command Line Interface

   • They were used before GUIs were invented
   • A command-line interface (CLI) is a means of interacting with a computer program where the user issues commands to the program in the form of successive lines of text (command lines)

4. Examples

   • Windows 7
   • Windows XP
   • OS X
   • Linux
   • Android
   • iOS

5. Drivers

   • A driver is software that allows your computer to communicate with hardware or devices.
     • Without drivers, the hardware you connect to your computer—for example, a video card or a printer—won't work properly.

6. Applications

   • An application, or application program, is a software program that runs on your computer.
     • Web browsers, e-mail programs, word processors, games, and utilities are all applications.