GNU tar manual suggestion

[Gerhard Poul]

Actually I think it does. In the introduction you can find this subsection:

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@node What tar Does
@section What @command{tar} Does

@cindex tar
The @command{tar} program provides the ability to create @command{tar}
archives, as well as various other kinds of manipulation.  For example,
you can use @command{tar} on previously created archives to extract files,
to store additional files, or to update or list files which were already
stored.

Initially, @command{tar} archives were used to store files conveniently on
magnetic tape.  The name @command{tar} comes from this use; it stands for
@code{t}ape @code{ar}chiver.  Despite the utility's name, @command{tar} can
direct its output to available devices, files, or other programs (using
pipes).  @command{tar} may even access remote devices or files (as archives).

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yours,
  gpoul