Refers to a CPUStands for "central processing unit." Basically, it's a microprocessor - the main one in the computer. Things get a bit more complicated because, these days, there may be more than one microprocessor. But you can safely think of all of them together as the CPU. changing from one threadA piece of a program that can execute at the same time that some other piece of that same program can execute. to another, with all of the related information from one thread being stored and replaced by the same type of information for the new thread.
Inside the Internet of Things - Bryon Moyer Blog