They can usually be viewed or extracted using a file archiver with support for the ZIP file format. One can also create .pk3 files using software designed for that purpose.
Quake IV, the sequel to Quake III, uses .pk4 files alongside the Doom 3 engine.
Apple gets industry support for Internet 3-D exchange standard; the 3DMF format could end up as the file extension for VRML. (Technology Information)(Brief Article)
Mar 01, 1996; You may not have heard much about eWorld lately. However, Apple Computer is redeeming its reputation for online innovation by...