information processing system vs plotter

information processing system and plotter both are nouns.

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

information processing system (noun)	plotter (noun)
a machine for performing calculations automatically	an instrument (usually driven by a computer) for drawing graphs or pictures
	a member of a conspiracy
	a planner who draws up a personal scheme of action
	a clerk who marks data on a chart