MPQ, or "MoPaQ" supposedly derived from Mike O'Brien Pack, is a proprietary data archive file format developed by Blizzard Entertainment and used in World of Warcraft.
For the WoW Warlords of Draenor expansion, MPQ was replaced by the newer CASC archive format.
- MPQ on Wikipedia - MPQ history
- MPQ archive format on zezula.net - MPQ technical description
- The MoPaQ Archive Format - the basis for work on Zezula.net
- Ladik's MPQ Editor on zezula.net - Archive view and edit tool. Supports Diablo I, Starcraft II and more
- libmpq on libmpq.org - Open source MPQ manipulation library