read-only file vs computer file

read-only file and computer file both are nouns.

Word	Noun	Adjective	Verb	Adverb
read-only file	Yes	No	No	No
computer file	Yes	No	No	No

As nouns, computer file is a hypernym of read-only file; that is, computer file is a word with a broader meaning than read-only file:

read-only file: (computer science) a file that you can read but cannot change
computer file: (computer science) a file maintained in computer-readable form

read-only file (noun)	computer file (noun)
(computer science) a file that you can read but cannot change	(computer science) a file maintained in computer-readable form