(computer science) the part of a computer (a microprocessor chip) that does most of the data processing;
"the CPU and the memory form the central part of a computer to which the peripherals are attached"
- It allows data to be read into the CPU and written from the CPU.
- Each controller on a bus can be individually addressed by the CPU, this is why the software device driver can write to its registers and thus control it.
- Once the power of a computer is turned on, all the behaviors are under the control of CPU.