computing device vs information processing system

computing device and information processing system both are nouns.

Word	Noun	Adjective	Verb	Adverb
computing device	Yes	No	No	No
information processing system	Yes	No	No	No

As nouns, computing device and information processing system are synonyms defined as:

computing device and information processing system: a machine for performing calculations automatically

Other synonyms of computing device include computer, computing machine, data processor, electronic computer.

computing device (noun)	information processing system (noun)
a machine for performing calculations automatically	a machine for performing calculations automatically