Organization Operations Research Society of America

Boeing

NASA

Aerospace Corporation

North American Rockwell

Pepperdine Research Institute (founding President)

American Astronautical Society

American Institute of Aeronautical and Astronautical Engineers

American Association for the Advancement of Science

Royal Astronomical Society

British Interplanetary Society

BYTE Magazine

Citizen's Advisory Council on National Space Policy (chair)

Society for Creative Anachronism

Science Fiction and Fantasy Writers of America (past President)

Authors Guild

The Lunar Society, Inc. (chair)

United States Army

United States Navy (WWII)

Haller, Raymond and Brown Inc.

HRB-Singer Inc.

United States Department of Defense

MITRE Corporation

United States Air Force

Federal Aviation Administration

Institute of Electrical and Electronics Engineers

American Institute of Aeronautics and Astronautics

National Academy of Engineering

Chief Executives Forum

American Physical Society

Sigma Pi Sigma

Sigma Xi

American Association for the Advancement of Science

American Public Health Association

American Psychological Association

American Sociological Association

Society for Applied Anthropology

Society for General Systems

Society for Medical Anthropology