DIG64 or Developers' Interface Guide for 64-bit Intel Architecture Servers is an alliance between several leading technology companies including Groupe Bull

Groupe Bull

-External links:* * — Friends, co-workers and former employees of Bull and Honeywell* *...

, Fujitsu Siemens, Hitachi

Hitachi, Ltd.

is a Japanese multinational conglomerate headquartered in Marunouchi 1-chome, Chiyoda, Tokyo, Japan. The company is the parent of the Hitachi Group as part of the larger DKB Group companies...

, HP

Hewlett-Packard

Hewlett-Packard Company or HP is an American multinational information technology corporation headquartered in Palo Alto, California, USA that provides products, technologies, softwares, solutions and services to consumers, small- and medium-sized businesses and large enterprises, including...

, Intel, NEC

NEC

, a Japanese multinational IT company, has its headquarters in Minato, Tokyo, Japan. NEC, part of the Sumitomo Group, provides information technology and network solutions to business enterprises, communications services providers and government....

, and Unisys

Unisys

Unisys Corporation , headquartered in Blue Bell, Pennsylvania, United States, and incorporated in Delaware, is a long established business whose core products now involves computing and networking.-History:...

.

The corporation has responsibility for driving for interoperability on Itanium

Itanium

Itanium is a family of 64-bit Intel microprocessors that implement the Intel Itanium architecture . Intel markets the processors for enterprise servers and high-performance computing systems...

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.