Adobe Systems, Inc.
American Express Foundation
Aon Corporation
AT&T
Bank of America
Barclays Global Investors
Bill and Melinda Gates Foundation
BD, Inc.
BP Foundation
Catalysis Corporation
Charles Schwab
Computer Associates
Constellation Brands
David and Lucile Packard Foundation
Deutsche Bank Americas Foundation
Equifax Foundation
Flora Family Foundation
Ford Foundation
Gap, Inc.
Genentech
Hanson, Bridgett, Marcus, Vlahos, & Rudy, LLP
Harcourt, Inc.
IDG Games Media Group
J. P. Morgan Chase
John D. and Catherine T. MacArthur Foundation
Levi Strauss Foundation
Lord, Abbett, and Company
Mal Warwick and Associates
Marguerite Casey Foundation

McGraw-Hill Companies
McMaster-Carr Supply Company
Medarex
Merck
Microsoft Corporation
Open Society Institute
Open Source Applications Foundation
Pacific Gas and Electric Company
Pew Charitable Trusts
Pfizer Foundation
Pioneer Hi-Bred International, Inc.
Prospect Hill Foundation, Inc.
Robert R. McCormick Tribune Foundation
Rockefeller Foundation
Sonoma Technology, Inc.
Starbucks
Sun Microsystems Foundation
Takeda Pharmaceuticals North America
Capital Group Companies Charitable Foundation
Three Guineas Fund
W. K. Kellogg Foundation
Washington Mutual
Washington Post
Weil Capital Management
WellPoint
Wells Fargo
World Reach, Inc.
WRQ, Inc.