In computing and in systems theory, FIFO is an acronym for first in, first out (the first in is the first out), a method for organizing the manipulation of a data structure (often, specifically a data buffer) where the oldest (first) entry, or “head” of the queue, is processed first.
Related: Last in, first out
Bibliography
“FIFO (Computing and Electronics).” 2022. Wikipedia, August. https://en.wikipedia.org/w/index.php?title=FIFO_(computing_and_electronics)&oldid=1104188471.