Main functions of the OS in a general purpose computer

 https://data-notes.co/how-operating-systems-work-10-concepts-you-should-know-as-a-developer-8d63bb38331f

1. Process management.
2. Process scheduling
3. Memory management..
4. I/O Management.
5. Interrupt handling.
6. Exception handling and system recovery.
7. Providing System interface APIs for application developers.
8. System security..