bus vs information processing system

bus and information processing system both are nouns.

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

bus (noun)	information processing system (noun)
a vehicle carrying many passengers; used for public transport	a machine for performing calculations automatically
a car that is old and unreliable
an electrical conductor that makes a common connection between several circuits
the topology of a network whose components are connected by a busbar

bus (verb)	information processing system (verb)
remove used dishes from the table in restaurants
ride in a bus
send or move around by bus