DIG64 or Developers' Interface Guide for 64-bit Intel Architecture Servers is an alliance between several leading technology companies including Groupe Bull, Fujitsu Siemens, Hitachi, HP, Intel, NEC, and Unisys.The corporation has responsibility for driving for interoperability on Itanium platforms. To do this they support a specification, also called DIG64, that helps member companies develop better and more compelling products on Itanium processor family architecture systems.