What is event polling?
An event-polling OS catches input signals (keystrokes, mouse clicks, etc.. they're collectively known as 'events') and piles them up in a list called the 'event queue'.
In a multitasking, event polling OS, each program has a private
event queue as part of its context. the OS identifies signals
as they come in and adds them to the appropriate queue. then
each program checks its queue for events while its context is