personal computer vs PC

personal computer and PC both are nouns.

Word	Noun	Adjective	Verb	Adverb
personal computer	Yes	No	No	No
PC	Yes	No	No	No

As nouns, personal computer and PC are synonyms defined as:

personal computer and PC: a small digital computer based on a microprocessor and designed to be used by one person at a time

Other synonyms of personal computer include microcomputer.

personal computer (noun)	PC (noun)
a small digital computer based on a microprocessor and designed to be used by one person at a time	a small digital computer based on a microprocessor and designed to be used by one person at a time