Operating System

Operating System

1. Purpose and Utilities

   • The operating system is a layer of software between the applications and the hardware. It manages open applications, providing a user interface, multi-tasking, security and memory management. It sends outputs to the device drivers, and receiving input from the devices. The complexity of storing, retrieving, inputting and outputting to the hardware is transparent to the user, the user is only exposed to the user interface in applications.

2. Memory Management

   • Virtual Memory
     • The virtual memory is used when the RAM is running low of memory
   • Paging
   • Segmentation

3. Examples

   • Windows 10
   • Mac OSX
   • Linux