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+.TH ROT13 1
+
+.SH NAME
+
+rot13 \- decrypt/encrypt 13-degree caesar-rotated text
+
+.SH DESCRIPTION
+
+.B rot13
+is a filter program that writes to standard output each Alphabet character from standard input, rotated 13 places.
+Non-Alphabet characters are ignored.
+
+.SH DIAGNOSTICS
+
+.B rot13
+will exit with the appropriate status from sysexits(3) if executed improperly.
+Otherwise,
+.B rot13
+will always exit with status 0, unless there are any unforeseen errors, in which case it will crash without grace. 
+
+
+.SH BUGS
+
+Not Unicode compatible.
+
+.SH COPYRIGHT
+
+Public domain.
+
+.SH SEE ALSO
+
+caesar(1)