computer program vs routine

computer program and routine both are nouns.

Word	Noun	Adjective	Verb	Adverb
computer program	Yes	No	No	No
routine	Yes	Yes	No	No

computer program (noun)	routine (noun)
(computer science) a sequence of instructions that a computer can interpret and execute	an unvarying or habitual method or procedure
	a set sequence of steps, part of larger computer program
	a short performance that is part of a longer program

computer program (adjective)	routine (adjective)
	found in the ordinary course of events