LZS221

File Format
Name	LZS221
Ontology	Electronic File Formats Compression LZS221
Released	≤1992

LZS221 is a data compression library, and associated compressed file format, by Stac Electronics.

This article is meant to cover the file format associated with the LZSDEMO software listed below. It is sometimes called "LZS221" format, though it's not clear whether that is actually a good name for it.

LZSDEMO does not appear to use a standard filename extension for the format.

Format details

An LZS221 file consists of a 4-byte signature, followed by any number of blocks of Lempel–Ziv–Stac compressed data.

Identification

Files begin with ASCII "sTaC".

Software

• LZSDEMO v3.1 (1992) - LZS221 Compression Demonstration (DOS software)
• Deark

Sample files

• dexvert samples — archive/lzs221

Links

• STACTECH.ZIP/1106.TXT - Possibly related information