A multitasking operating system is an operating system that gives you the perception of 2 or more tasks/jobs/processes running at the same time. It does this by dividing system resources amongst these tasks/jobs/processes and switching between the tasks/jobs/processes while they are executing over and over again. Usually, the CPU processes only one task at a time but the switching is so fast that it looks like the CPU is executing multiple processes at a time. They can support either preemptive multitasking, where the OS provides time to applications (virtually all modern OS), or cooperative multitasking, where the OS waits for the program to give back control (Windows 3.x, Mac OS 9, and earlier), leading to hangs and crashes. Also known as Timesharing, multitasking is a logical extension of multiprogramming.
Multitasking programming is of two types which are as follows :
1. Process-based Multitasking
2. Thread-based Multitasking
