American Medical Association
American Society of Civil Engineers
APM Publishing
Association of Learned and Professional Society Publishers (ALPSP)
Association of Project Management
Atypon Systems
Berg Publishers
Berkeley Electronic Press
British Psychological Society
Columbia University Press
Credo Reference
Dunedin Academic Press
Earthscan
Edinburgh University Press
Geological Society of America
International Association of Hydraulic Engineering and Research (IAHR)
JISC
Knovel Corporation
LOGOS: The Journal of the World Book Community
Macmillan Publisher Solutions
OECD
Publishing Research Consortium
Sapiens Publishing
Scholarly Communications Report
Turpin Distribution
UKSG

Customers of the Consortium Purchasing Directory: Editions 3 and 4 include:

American Academy of Pediatrics
American Medical Association
American Society for Clinical Oncology
American Society for Microbiology
Association of Computing Machinery
Berg Publishers
BioMed Central
CHOICE
Columbia University Press
Credo Reference
Duke University Press
ebrary
EBSCO Information Services
Emerald Group Publishing
FASEB
Haworth Press
Inderscience
Informa Healthcare
Ingram Digital
Institute of Physics Publishing
JSTOR / Portico
KESLI
Marquis Who's Who
Massachusetts Medical Society / New England Journal of Medicine
OECD
Optical Society of America
Ovid
Oxford University Press
Professional Engineering Publishing
ProQuest CSA
Rockefeller University Press
SAGE Publications
Springer SBM
Swets
Taylor and Francis
University of California Press
University of Chicago Press
Wiley Blackwell