Operating systems

Operating systems

1. Examples of operating systems: Windows, Mac OS, LINUX, UNIX, Android, IOS.

2. CPU

   • Multi-tasking
     • Splits processor time between different programs. Making them appear to run simultaneously
   • Manages processor by allocating time to running processes.

3. Security

   • Authenticates users and prevents access to restricted files.

4. Peripherals

   • External hardware devices
   • Drivers used to map OS codes and hardware codes.
     • OS needs a new driver to work with new hardware

5. Backing store

   • Cloud
   • Local
   • Manages backups of important data

6. Memory RAM

   • Splits memory into pages to prevent programs from reading each others data

7. Interrupts

   • Hardware
     • Triggered by programs
   • Software
     • Triggered by keyboard, mouse ...
   • Pauses Currently running processes to run specific code