An operating system is the most important software that runs on a computer. It manages the computer’s memory and processes, as well as all of its software and hardware. It also allows you to communicate with the computer without knowing how to speak the computer’s language.

What are the 4 Roles of an operating system?

Operating system functions

• Controls the backing store and peripherals such as scanners and printers.
• Deals with the transfer of programs in and out of memory.
• Organises the use of memory between programs.
• Organises processing time between programs and users.
• Maintains security and access rights of users.
• Deals with errors and user instructions.

How does the operating system control software?

Functions of the operating system

manages the CPU – runs applications and executes and cancels processes. multi-tasks – allows multiple applications to run at the same time. managesmemory – transfers programs into and out of memory, allocates free space between programs, and keeps track of memory usage.