Dif produces a difference file which lists the line by line differences
between any two text files.  These differences can be fed to ssed (a stream
type editor), along with the original text file, to remotely reproduce the
other (new) file.  

 PERMSSN    UID  GID    PACKED    SIZE  RATIO     CRC       STAMP          NAME
---------- ----------- ------- ------- ------ ---------- ------------ -------------
[generic]                 6266   11156  56.2% -lh5- a991 Jan 12  1987 DifSsed/dif
[generic]                 2132    5001  42.6% -lh5- 1a1d Jan 12  1987 DifSsed/difssed.doc
[generic]                 4847    8580  56.5% -lh5- 85d1 Jan 12  1987 DifSsed/ssed
---------- ----------- ------- ------- ------ ---------- ------------ -------------
 Total         3 files   13245   24737  53.5%            Jan 12  1987