pr is a command used to paginate or columnate files for printing. It can also be used to compare two files side by side, as an alternative to diff.

Developer(s)AT&T Bell Laboratories
Initial releaseNovember 3, 1971; 48 years ago (1971-11-03)
Operating systemUnix and Unix-like, OS-9

It is a required program in a POSIX-compliant environment and has been implemented by GNU as part of the GNU Core Utilities. The command is also available in the OS-9 shell.[1]


  1. ^ Paul S. Dayan (1992). The OS-9 Guru - 1 : The Facts. Galactic Industrial Limited. ISBN 0-9519228-0-7.

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