Operating Systems

Operating Systems

1. A collection of programs that manages the hardware and software of a computer system including sharing the computers times, memory, hardware and other resources

2. File Management

   • Creates a file system to organise files and directories- a hierarchy of directories
     • Hierarchy of directories

3. Hardware management

   • manages memory : transfers programs into and out of memory, allocates free space between programs, and keeps track of memory usage
   • manages peripherals :opens, closes and writes to peripheral devices such as storage attached to the computer
   • Drivers are software that allows us to use the actual hardware components

4. User management

   • Allows user interface
     • Graphical user interface (GUI): The OS on most computers and smartphones provides an environment with tiles, icons and/or menus. This type of interface is called the graphical user interface (GUI) because the user interacts with images through a mouse, keyboard or touchscreen.
     • Command line interface (CLI): An OS also provides a method of interaction that is non-graphical, called the command line interface (CLI). This is a text-only service with feedback from the OS appearing in text. Using a CLI requires knowledge of the commands available on a particular machine.
   • security : it provides security through user accounts and passwords.

5. Process management

   • Multi-tasks: allows multiple applications to run at the same time

6. Utilities: provides tools for managing and organising hardware

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