electronic computer vs information processing system

electronic computer and information processing system both are nouns.

Word	Noun	Adjective	Verb	Adverb
electronic computer	Yes	No	No	No
information processing system	Yes	No	No	No

As nouns, electronic computer and information processing system are synonyms defined as:

electronic computer and information processing system: a machine for performing calculations automatically

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

electronic computer (noun)	information processing system (noun)
a machine for performing calculations automatically	a machine for performing calculations automatically