As of 27 April 2007: 80 Members at full-fee level (440 total)
| Member | Country | Date Joined |
| Adobe Systems Inc. | United States | 1995-01-01 |
| Agfa-Gevaert N. V. | Belgium | 1996-07-01 |
| Alcatel-Lucent | France | 1995-07-01 |
| Amadeus s.a.s. | France | 2004-01-01 |
| American Express Company | United States | 2006-07-01 |
| AOL LLC | United States | 1995-04-01 |
| Apple, Inc. | United States | 1996-01-01 |
| Aspect Communications | United States | 2003-07-01 |
| AstraZeneca | Sweden | 2006-10-01 |
| AT&T | United States | 1994-10-01 |
| Avaya Communications | United States | 2000-10-01 |
| BEA Systems, Inc. | United States | 1998-10-01 |
| BitFlash Division of Open Text | Canada | 1999-01-01 |
| The Boeing Company | United States | 1997-10-01 |
| BT | United Kingdom | 1995-07-01 |
| CA | United States | 2002-01-01 |
| Canon, Inc. | Japan | 1996-07-01 |
| Chevron | United States | 2000-10-01 |
| Cisco Systems | United States | 1998-07-01 |
| Citigroup | United States | 2006-01-01 |
| Comverse Technology | Israel | 2000-10-01 |
| Deutsche Telekom AG, T-Com | Germany | 1995-07-01 |
| Dow Jones & Company | United States | 2006-07-01 |
| Electronic Data Systems | United States | 2001-07-01 |
| EMC Corporation | United States | 2007-01-01 |
| ERICSSON | Sweden | 1996-01-01 |
| Fair Isaac Corporation | United States | 2005-10-01 |
| France Telecom | France | 1995-07-01 |
| Fujitsu Limited | Japan | 1995-01-01 |
| United States | 2004-04-01 | |
| HP | United States | 1995-07-01 |
| Hitachi, Ltd. | Japan | 1996-01-01 |
| Hutchison 3G | United Kingdom | 2005-04-01 |
| IBM Corporation | United States | 1995-01-01 |
| ILOG, S.A. | France | 1995-10-01 |
| Intel Corporation | United States | 1996-07-01 |
| Intervoice, Inc. | United States | 2001-10-01 |
| IONA Technologies, Inc. | Ireland | 2000-04-01 |
| Justsystem Corporation | Japan | 2005-01-01 |
| KDDI Corporation | Japan | 2001-04-01 |
| Lexmark International, Inc. | United States | 1996-07-01 |
| Lockheed Martin Corporation | United States | 2003-10-01 |
| Matsushita Electric Industrial Co., Ltd. | Japan | 1997-10-01 |
| Merck & Co., Inc. | United States | 2005-01-01 |
| Microsoft Corporation | United States | 1995-01-01 |
| Motorola, Inc. | United States | 2006-07-01 |
| NEC Corporation | Japan | 1995-04-01 |
| Nippon Telegraph & Telephone Corp. | Japan | 1995-10-01 |
| Nokia | Finland | 1995-07-01 |
| Nortel Networks | Canada | 1998-07-01 |
| NTT DoCoMo | Japan | 1997-10-01 |
| Nuance Communications, Inc. | United States | 2002-07-01 |
| Openwave Systems Inc. | United States | 1996-10-01 |
| Oracle Corporation | United States | 1995-07-01 |
| Pfizer Inc | United States | 2005-10-01 |
| Pitney Bowes, Inc. | United States | 2005-07-01 |
| PTC-Arbortext | United States | 2005-10-01 |
| RealNetworks | United States | 1996-04-01 |
| Research In Motion, Ltd. | Canada | 2003-01-01 |
| Ricoh Company, Ltd. | Japan | 2002-04-01 |
| Samsung Electronics Co., Ltd. | Korea | 2007-01-01 |
| SAP AG | Germany | 1998-01-01 |
| Seiko Epson Corporation | Japan | 2000-07-01 |
| Sharp Corporation | Japan | 1997-07-01 |
| Siemens AG | Germany | 2000-01-01 |
| SK Telecom | Korea | 2006-04-01 |
| Software AG | Germany | 1999-01-01 |
| Sonic Software | United States | 1999-01-01 |
| Sun Microsystems, Inc. | United States | 1994-10-01 |
| TeleCable de Asturias | Spain | 2003-10-01 |
| Telecom Italia SpA | Italy | 2005-04-01 |
| Telefónica de España | Spain | 2003-10-01 |
| TIBCO Software, Inc. | United States | 2000-10-01 |
| Toshiba Corporation | Japan | 1997-04-01 |
| VeriSign, Inc. | United States | 1997-04-01 |
| Vignette Corporation | United States | 1997-07-01 |
| Vodafone | United Kingdom | 2003-10-01 |
| Walt Disney Internet Group | United States | 2005-07-01 |
| webMethods, Inc. | United States | 1997-04-01 |
| Xerox Corporation | United States | 2005-04-01 |
| Yahoo!, Inc. | United States | 2005-01-01 |