You know what it looks like… but what is it called?
TAKE THE QUIZ“first in”
We have one entry that includes the term first in.
first in, first out
adjective: being or relating to a method of valuing inventories by which items in the lot first received are assumed to be issued or sold first and requisitions are priced at the cost per item of the oldest lot on hand compare last in, first out
Love words? Need even more definitions?
Merriam-Webster unabridged