Aldus LZW

File Format
Name	Aldus LZW
Ontology	Electronic File Formats Compression Aldus LZW ; ; ;
Extension(s)	.??~, others
Released	≤1990

Aldus LZW is the signature of a compressed file format used for installation by some Aldus software products. It is very similar to Aldus PKZP.

Format details

There appear to be two variants of Aldus LZW: one for Macintosh, and one for PC / Windows 3.x.

It uses LZW compression, possibly identical to TIFF's LZW scheme.

The first 16 bytes of a file are ASCII "ALDUS LZW 1.00".

PM4DEMO1.ZIP → .../*.??~ (Windows)
Mac Expert 2 → Applications/Aldus PageMaker 4.5C/PM 3 → Aldus/PPDs-PM4.5C/* (Mac) (at DiscMaster)