Locality of reference

What does locality of reference mean in term of operating system

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In order to run a computer, several data locations needs to be referenced in a short period of time. Such data locations consists are in relatively well predictable clusters. This concept of frequently accessing same or related value storage locations is known as Locality of Reference. It is also known as "principle of locality" / "locality principle".

Few special cases of locality are as follows:

1. Temporal locality,
2. Spatial locality,
3. Equidistant locality
4. Branch locality.

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