TiB vs computer memory unit

TiB and computer memory unit both are nouns.

Word	Noun	Adjective	Verb	Adverb
TiB	Yes	No	No	No
computer memory unit	Yes	No	No	No

As nouns, computer memory unit is a hypernym of TiB; that is, computer memory unit is a word with a broader meaning than TiB:

TiB: a unit of information equal to 1024 gibibytes or 2^40 (1,099,511,627,776) bytes
computer memory unit: a unit for measuring computer memory

TiB (noun)	computer memory unit (noun)
a unit of information equal to 1024 gibibytes or 2^40 (1,099,511,627,776) bytes	a unit for measuring computer memory