CPU vs C.P.U.

CPU and C.P.U. both are nouns.

Word	Noun	Adjective	Verb	Adverb
CPU	Yes	No	No	No
C.P.U.	Yes	No	No	No

As nouns, CPU and C.P.U. are synonyms defined as:

CPU and C.P.U.: (computer science) the part of a computer (a microprocessor chip) that does most of the data processing

Other synonyms of CPU include central processing unit, central processor, mainframe, processor.

CPU (noun)	C.P.U. (noun)
(computer science) the part of a computer (a microprocessor chip) that does most of the data processing	(computer science) the part of a computer (a microprocessor chip) that does most of the data processing