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Representation of a FIFO queue. In computing and in systems theory, first in, first out (the first in is the first out), acronymized as FIFO, is 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.
It is often abbreviated to FIFO when referring to employment status. This is common in large mining regions in Australia [ 1 ] [ 2 ] and Canada. Similar to the fly-in fly-out roster are the DIDO (drive-in drive-out), BIBO (bus-in bus-out) and SISO (ship-in ship-out) rosters .
FIFO in stock rotation, particularly to avoid food spoilage; FIFO (computing and electronics), a method of queuing or memory management Queue (abstract data type), data abstraction of the queuing concept; FIFO and LIFO accounting, methods used in managing inventory and financial matters
The operations of a queue make it a first-in-first-out (FIFO) data structure. In a FIFO data structure, the first element added to the queue will be the first one to be removed. This is equivalent to the requirement that once a new element is added, all elements that were added before have to be removed before the new element can be removed.
A backup rotation scheme is a system of backing up data to computer media (such as tapes) that minimizes, by re-use, the number of media used.The scheme determines how and when each piece of removable storage is used for a backup job and how long it is retained once it has backup data stored on it.
In computing, a named pipe (also known as a FIFO for its behavior) is an extension to the traditional pipe concept on Unix and Unix-like systems, and is one of the methods of inter-process communication (IPC). The concept is also found in OS/2 and Microsoft Windows, although the semantics differ substantially.
A typical use of Gray code counters is building a FIFO (first-in, first-out) data buffer that has read and write ports that exist in different clock domains. The input and output counters inside such a dual-port FIFO are often stored using Gray code to prevent invalid transient states from being captured when the count crosses clock domains. [53]
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