information processing system vs memory

information processing system and memory both are nouns.

Word	Noun	Adjective	Verb	Adverb
information processing system	Yes	No	No	No
memory	Yes	No	No	No

information processing system (noun)	memory (noun)
a machine for performing calculations automatically	an electronic memory device
	the power of retaining and recalling past experience
	the cognitive processes whereby past experience is remembered
	something that is remembered
	the area of cognitive psychology that studies memory processes