What (who) is first-in first-out - definition

SCHEDULING ALGORITHM

First-in, first-out; First-in first-out; FIFO queuing; FCFS (computing); First In First Out; Last In, Last Out; Last in, last out; First-in, first out; First In, First Out; FIFO (computing)

first-in first-out

<algorithm> (FIFO, or "queue") A data structure or hardware buffer from which items are taken out in the same order they were put in. Also known as a "shelf" from the analogy with pushing items onto one end of a shelf so that they fall off the other. A FIFO is useful for buffering a stream of data between a sender and receiver which are not synchronised - i.e. not sending and receiving at exactly the same rate. Obviously if the rates differ by too much in one direction for too long then the FIFO will become either full (blocking the sender) or empty (blocking the receiver). A Unix pipe is a common example of a FIFO. A FIFO might be (but isn't ever?) called a LILO - last-in last-out. The opposite of a FIFO is a LIFO (last-in first-out) or "stack". (1999-12-06)

2008–09 Maltese First Division knock-out

FOOTBALL TOURNAMENT SEASON

First Division knock-out 2008-09; Maltese First Division knock-out 2008–09; 2008-09 Maltese First Division knock-out; Maltese First Division knock-out 2008-09

The First Division Knock-Out 2008-09 is a group and knock-out competition for football teams from the Maltese First Division. This year's format differs from the previous 2 years in that the simple knock-out has been replaced by two groups, the top two from each qualifying for the semi-finals.

https://en.wikipedia.org/wiki/2008–09_Maltese_First_Division_knock-out

2006–07 Maltese First Division knock-out

FOOTBALL TOURNAMENT SEASON

First Division knock-out 2006-07; First Division knock-out 2006–07; Maltese First Division knock-out 2006–07; 2006-07 Maltese First Division knock-out; Maltese First Division knock-out 2006-07

The Maltese First Division knock-out 2006–07 (known as EuroSport First Division knock-out 2006-07 due to sponsorship reasons) was a knock-out competition for Maltese football clubs from the First Division.The winners were Tarxien and the runner-up were Mosta.

https://en.wikipedia.org/wiki/2006–07_Maltese_First_Division_knock-out

Wikipedia

FIFO (computing and electronics)

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.

Such processing is analogous to servicing people in a queue area on a first-come, first-served (FCFS) basis, i.e. in the same sequence in which they arrive at the queue's tail.

FCFS is also the jargon term for the FIFO operating system scheduling algorithm, which gives every process central processing unit (CPU) time in the order in which it is demanded. FIFO's opposite is LIFO, last-in-first-out, where the youngest entry or "top of the stack" is processed first. A priority queue is neither FIFO or LIFO but may adopt similar behaviour temporarily or by default. Queueing theory encompasses these methods for processing data structures, as well as interactions between strict-FIFO queues.

https://en.wikipedia.org/wiki/FIFO (computing and electronics)

Examples of use of first-in first-out

1. It‘s not just a matter of first in, first out since his time at Bass, which came before that, did figure.

2. The office does not have a formal "first in, first out" policy for when claims should be processed, and at times late applications from high–profile officials with government ties have jumped ahead in the line.

3. The math part is fairly straightforward and points to reductions by late summer, he said. The art that‘s being applied by the commanders on the ground might yield a different result,‘‘ he said. And that‘s what the commanders on the ground are assessing because they have to accomplish the mission.‘‘ The commanders might see a need to deviate from a straight–line approach – possibly deciding, for example, not to rigidly follow a first in, first out‘‘ policy for rotating units home.