Operating Systems

Operating Systems

1. Examples of operating systems

2. Definition

   • The low-level software that supports a computer's basic functions, such as scheduling tasks and controlling peripherals.

3. Functions of the operating system

   • Software Management
     • Creates a file system to organise files and directories, This is called a Hierachy
     • Provides a user interface so it is easy to interact with the computer
   • Hardware Management
     • Transfers programs into and out of memory, allocates free space between programs, and keeps track of memory usage
     • Opens, closes and writes to peripheral devices such as storage attached to the computer
   • User Management
     • command line interface (CLI). This is a text-only service with feedback from the OS appearing in text
     • This type of interface is called the Graphical User Interface (GUI) because the user interacts with images through a mouse, keyboard or touchscreen

4. Process Management

   • Allows multiple applications to run at the same time
   • Manages the CPU - Runs applications and executes and cancels processes

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