DACT

File Format
Name	DACT
Ontology	Electronic File Formats Compression DACT ; ; ;
Extension(s)	.dct
Released	2000

DACT (Dynamic Adaptive Compression Tool) is a file compression utility, and associated compressed file format, developed primarily by Roy Keene.

It was originally named DCL, but was soon renamed to DACT.

Identification

At least for version 0.8.42, files start with signature bytes 0x44 0x43 0x54 0xc3.

There is some minimal format information in the Docs/file_format.txt file included with the source code.