A terminal pager, paging program or simply pager is a computer program used to view (but not modify) the contents of a text file moving down the file one line or one screen at a time.
[1] A popular cross-platform terminal pager is more, which can move forwards and backwards in text files but cannot move backwards in pipes.
[2] less is a more advanced pager that allows movement forward and backward, and contains extra functions such as search.
[3] Some programs incorporate their own paging function, for example bash's tab completion function.
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