[fjtorres]

There are different kinds of multitasking:
- task-switching allows multiplle apps to be "active" but only the one the user is interacting with is using the CPU at any given instant.
- cooperative multi-tasking ala MacOS Switcher establishes a protocol that allows the switcher app to *ask* the running app to go to sleep at the next most convenient instant and turn the system over to the switcher, which then activates another dormant app. Again, at any instant only one app is active.
- true premptive multitasking, ala Windows, Unix, Linux, is where the OS juggles all resources in real time and keeps multiple apps running simultaneously and the apps stay active simultaneously. On multicore/multiprocessing system you *do* have multiple processes running at the exact same instant.

Windows not only is a full preemptive multitasking OS but it is also known to have one of the best, if not *the* best scheduler algorithms for multitasking good for single user mulltitasking as well as multi-user multitasking in clusters. That by itself makes Windows RT a strange beast: a tablet OS with the heart of a mainframe, not a phone.