Backups files automatically in regular intervalls using lha.
Does a complete backup each month and an incremental every week.
I do backups of my sources to zip since a year now.

 PERMSSN    UID  GID    PACKED    SIZE  RATIO     CRC       STAMP          NAME
---------- ----------- ------- ------- ------ ---------- ------------ -------------
[generic]                  142     160  88.8% -lh5- 5560 Aug  7  1998 mbackup/build
[generic]                  111     121  91.7% -lh5- d744 Aug  1  1998 mbackup/build.debug
[generic]                   12      12 100.0% -lh0- 9bf5 Aug  1  1998 mbackup/build.release
[generic]                  121     239  50.6% -lh5- ec0b Oct  8  1997 mbackup/dev-backup
[generic]                12425   20764  59.8% -lh5- 3797 Aug  7  1998 mbackup/mbackup
[generic]                 2812    7501  37.5% -lh5- d6da Aug  2  1998 mbackup/mbackup.c
[generic]                 1115    2173  51.3% -lh5- f9dd Aug  7  1998 mbackup/mbackup.doc
[generic]                  144     228  63.2% -lh5- 52f1 Aug  7  1998 mbackup/mbackup.lnk
[generic]                  121     183  66.1% -lh5- c4d8 Aug  1  1998 mbackup/project.h
[generic]                  249     386  64.5% -lh5- 2be4 Aug  7  1998 mbackup/SC_OPTIONS/SCOPTIONS.dbg.68000
[generic]                  195     296  65.9% -lh5- a519 Aug  7  1998 mbackup/SC_OPTIONS/SCOPTIONS.rel.68000
[generic]                  195     296  65.9% -lh5- a519 Aug  7  1998 mbackup/SCOPTIONS
[generic]                   19      19 100.0% -lh0- e97a Aug  1  1998 mbackup/test-backup
---------- ----------- ------- ------- ------ ---------- ------------ -------------
 Total        13 files   17661   32378  54.5%            Aug 10  1998