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Definition of "Last In First Out" |
The term in computing generally refers to the abstract principles of list processing and temporary storage, particularly when there is a need to access the data in limited amounts, and in a certain order. LIFO is most used in cases where the last data added to the structure must be the first data to be removed or evaluated. A useful analogy is of the office worker: a person can only handle one page at a time, so the top piece of paper added to a pile is the first off, parallel to limitations such as data bus width and the fact that one can only manipulate a single binary data address in a computer at a time. The abstract LIFO mechanism, when applied to computing inevitably devolves to the real data structures implemented as stacks whose eponymous relation to the "stack of paper", "stack of plates" should be obvious. Other names for the device are "Push down list" and "piles". |
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