ZSQ (LZW compression)

File Format
Name	ZSQ (LZW compression)
Ontology	Electronic File Formats Compression ZSQ (LZW compression)
Extension(s)	.?z?, .zzz
Released	1985

ZSQ is a file compression utility developed by Wayne Chin and Arvind Kumar. It describes itself as "File Squeezer using LZW compression algorithm". The companion decompression utility is ZUSQ.

ZSQ might have been a contestant in the race to make a usable format based on LZWCOM, but lost to ARC and Crunch. It uses the same file naming pattern as Crunch.

Identification

Files apparently start with ASCII "WACK".

Software

• ZSQUSQ.ZIP - ZSQ v1.0 and ZUSQ v1.0 (DOS software)
• Deark

Sample files

• https://telparia.com/fileFormatSamples/archive/zsq/