In computing, cooperative multitasking is a form of multitasking in which multiple tasks execute by voluntarily cedeing control to other tasks at programmer-defined points within each task. Operating systems such as Microsoft Windows prior to Windows NT, and MacOS prior to OS X relied on this approach to execute multiple programs simultaneously.
While its usage in modern computing is on the wane, RISC OS is an example of an operating system which still retains this method.
