ARQ

File Format
Name	ARQ
Ontology	Electronic File Formats Archiving ARQ
Extension(s)	.arq, others
Released	≤1994

ARQ is a compressed archive format, apparently associated with the Crusher data compression toolkit by DC Micro Development. It is supported by a DOS program named "ARQ Crusher!".

The format was apparently used by several installer programs, notably Setup Factory by Indigo Rose, whose packages may include an ARQ-format file named IRDATA.IRD.

Identification

ARQ files start with bytes hex 67 57 04 01.

Software

• ARQ.EXE
• ARQ Crusher! v3.2 1997-02-03
• Archived copies of arq.exe

Sample files

• dexvert samples — archive/arq
• WIZPAINT.ZIP → IRDATA.IRD

Links

• DC Micro website (2014 archive)