European Committee for Future Accelerators (ECFA)
- Works for long-range planning of European high-energy facilities - accelerators, large-scale facilities and equipment - adequate for the conduct of a valid high-energy research programme.
- http://committees2.web.cern.ch/Committees2/ECFA/Welcome.html

Abdus Salam International Centre for Theoretical Physics
- Aims to foster the growth of advanced studies and research in developing countries. Includes a database of affiliated scientists, information on activities, and research activities.
- http://www.ictp.it/

National Society of Black Physicists
- NSBP is the largest and most recognizable organization devoted to the African-American physics community.
- http://www.nsbp.org

Sigma Pi Sigma: The National Physics Honor Society
- Exists to honor outstanding scholarship in physics; to encourage interest in physics among students at all levels; to promote an attitude of service of its members towards their fellow students, colleagues, and the public; and to prov
- http://www.sigmapisigma.org/

The International Association of Physics Students (IAPS)
- IAPS aims to build a network of contacts between physics students from around the world, to offer them a programme of events and to support them in their academic and professional work.
- http://www.iaps.info/

Society of Physics Students (SPS) National Website
- SPS programs, scholarships, publications, news, career and education resources, science stories of note, physics games, simulations and humor, and physics problems on the web.
- http://www.spsnational.org/

Polish Physical Society
- Information on the statutes and members, as well as award winners of the society. Also contains links to other relevant sites.
- http://ptf.fuw.edu.pl/indexa.html

American Center for Physics
- A brief description of this facility. Includes related links.
- http://exeter.acp.org/

International Liquid Crystal Society
- Lists the membership, meetings, news and links to related sites.
- http://www.ilcsoc.org/

International Union of Pure and Applied Physics
- Sponsors international meetings and fosters the publication of papers.
- http://www.iupap.org/

International Research Group on Physics Teaching
- Promotes adapting physics teaching to the present knowledge. Fosters friendly contacts between physics teachers and professors above national barriers at all levels of education.
- http://www.pef.uni-lj.si/~girep/

Society of Vacuum Coaters (SVC)
- Nonprofit organization dedicated to the development of equipment and processes for high volume production of coatings using vacuum based methods.
- http://www.svc.org/

European Physical Society
- Includes an introduction, list of publications produced and their editorial boards, information on conferences and membership, and current activities.
- http://www.eps.org/

Central Michigan University Society of Physics Students
- This is the home page of the Central Michigan University chapter of the Society of Physics Students. We are a group of physics students who try to spread the love of physics to everyone.
- http://www.phy.cmich.edu/people/sps/

Landau Institute for Theoretical Physics
- Includes details of seminars and conferences, lists of members of research groups, lists of publications.
- http://www.itp.ac.ru/

National Insitute for Theoretical Physics (Australia)
- The NITP serves the Australian physics community by acting as an umbrella organisation for Theoretical Physics in Australia.
- http://www.physics.adelaide.edu.au/itp/index.html

Nordic Institute for Theoretical Physics
- Intergovernmental organization, research areas at NORDITA include astrophysics, condensed matter physics and subatomic physics.
- http://www.nordita.dk/

Institute of Physics
- Devoted to basic research in the fields of physics of atoms, molecules and plasma and solid state physics including surface science. Zagreb, Croatia.
- http://www.ifs.hr/en/

International Association of Mathematical Physics
- The International Association of Mathematical Physics (IAMP) was founded in 1976 in order to promote research in mathematical physics. The Association invites mathematicians and physicists (including students) interested in this goal to become members.
- http://www.iamp.org/

European High Pressure Research Group (EHPRG)
- Brings together scientists and engineers involved in high pressure research.
- http://www.ehprg.org/

American Association of Physicists in Medicine
- AAPM homepage with a link to the journal "Medical Physics".
- http://aapm.org/

Institute of Physics (IOP)
- Job news, journals, author and referee services, conference diary.
- http://www.iop.org/

Canadian Association of Physicists
- The premier association for physicists living in Canada (or who have any interest in physics)
- http://www.cap.ca

American Institute of Physics
- Gateway for news, jobs, and other physics resources. AIP is a STM publisher of research journals, proceedings and other scientific publications. AIP provides services for scientific societies including membership and subscription management.
- http://www.aip.org/

American Physical Society (APS)
- information, member directory, and many links
- http://www.aps.org/