A central processing unit (CPU), or sometimes simply processor, is the component in a
digital computer capable of executing a program. It interprets computer program
instructions and processes
data. CPUs provide the fundamental digital computer trait of
programmability, and are one of the necessary components found in
computers of any era, along with
primary storage and
input/output facilities. A CPU that is manufactured as a single
integrated circuit is usually known as a
microprocessor. Beginning in the mid-1970s, microprocessors of ever-increasing complexity and power gradually supplanted other designs, and today the term "CPU" is usually applied to some type of microprocessor.
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