systems software vs system program

systems software and system program both are nouns.

Word	Noun	Adjective	Verb	Adverb
systems software	Yes	No	No	No
system program	Yes	No	No	No

As nouns, systems software and system program are synonyms defined as:

systems software and system program: a program (as an operating system or compiler or utility program) that controls some aspect of the operation of a computer

Other synonyms of systems software include systems program.

systems software (noun)	system program (noun)
a program (as an operating system or compiler or utility program) that controls some aspect of the operation of a computer	a program (as an operating system or compiler or utility program) that controls some aspect of the operation of a computer