Portable archiver.  Used to bundle text file up into a single file for
transmission as a unit, or otherwise handling as a single file.  "Portable"
because the code itself is portable and because the archive format is very
simple (uses ascii headers to separate files).  From Decus C distribution.

 PERMSSN    UID  GID    PACKED    SIZE  RATIO     CRC       STAMP          NAME
---------- ----------- ------- ------- ------ ---------- ------------ -------------
[generic]                11664   26064  44.8% -lh5- 7c7a Dec 25  1985 portar/portar
[generic]                10521   33361  31.5% -lh5- d41d Dec 25  1985 portar/portar.c
---------- ----------- ------- ------- ------ ---------- ------------ -------------
 Total         2 files   22185   59425  37.3%            Dec 25  1987