EPROM vs fixed storage

EPROM and fixed storage both are nouns.

Word	Noun	Adjective	Verb	Adverb
EPROM	Yes	No	No	No
fixed storage	Yes	No	No	No

As nouns, fixed storage is a hypernym of EPROM; that is, fixed storage is a word with a broader meaning than EPROM:

EPROM: (computer science) a read-only memory chip that can be erased by ultraviolet light and programmed again with new data
fixed storage: (computer science) memory whose contents can be accessed and read but cannot be changed

Other hypernyms of EPROM include read-only memory, read-only storage, ROM.

EPROM (noun)	fixed storage (noun)
(computer science) a read-only memory chip that can be erased by ultraviolet light and programmed again with new data	(computer science) memory whose contents can be accessed and read but cannot be changed