View source for SHRINK (executable compression)

{{FormatInfo
|formattype=electronic
|subcat=Compression
|subcat2=Executable compression
|released=1988
}}
'''SHRINK''' is an executable compression utility for DOS [[DOS executable (.com)|.COM]] files. It uses [[run-length encoding]].

The original SHRINK 1.0 (1988) was developed by Thomas G. Hanlin III. SHRINK 2.0 (1995) was developed by Kevin Tseng. The precise relationship between v1.0 and v2.0 is not clear.

== Identification ==
v1.00: The first 28 bytes of a compressed file are probably always the same. The first 16 are {{magic|50 9c fc be 1f 01 bf 00 7e 57 b9 34 00 f3 a4 8b}}.

v2.00: The first 35 bytes of a compressed file are probably always the same. The first 16 are {{magic|e9 00 00 50 9c fc be 27 01 8b fe 8c c8 05 00 10}}.

== Software ==
* SHRINK 1.0:
** {{CdTextfiles|simtel/simtel/DISK1/DISC2/EXECOMP/SHRINK.ZIP|SHRINK.ZIP}}
** {{OldskoolDOSEXE}} → Executable Tools Pack → packers/shrink.10-thomas hanlin
* SHRINK 2.0:
** {{OldskoolDOSEXE}} → Executable Tools Pack → packers/shrink.20-kevin tseng