Interface between the operating system and hardware devices

Detect and prevent deadlocks

Manage memory allocation

Manage file permissions

Contiguous allocation

Demand paging

Paging

Segmentation

Handle multiple I/O requests simultaneously

Organize files in directories

Allocate memory for running processes

Optimize CPU scheduling

The process has terminated

The process is waiting for a resource

The process is ready to execute

The process is performing I/O operations

CD-ROM

RAM

Hard drive

SSD

Binary file

Database file

Directory

Text file

Detect deadlocks

Manage I/O devices

Map logical addresses to physical addresses

Store executable code

Keyboard

Cache Memory

Mouse

Printer

Cache Answer

RAM

Hard drive

Secondary storage

To increase the computer’s processing speed

To convert high-level code into machine code

To act as an interface between the user and hardware

To connect different devices in a network