• North West Orthopaedic Trainees Association [Useful local information. Based in Manchester, UK.]
• American Osteopathic Association
• Orthopaedic & Trauma Foundation, Nepal

• Academic Orthopaedic Society [New location.]
• American Academy of Orthopaedic Surgeons
• American Association of Hip and Knee Surgeons
• American College of Sports Medicine
• American Congress on Rehabilitation Medicine
• American Orthopaedic Association
• American Orthopaedic Foot and Ankle Society
• American Orthopaedic Society for Sports Medicine
• American Osteopathic Association
• American Podiatric Medical Association
• American Shoulder and Elbow Surgeons
• The Arthritis Foundation [See also Seattle Chapter and Washington State Chapter.]
• Arthroscopy Association of North America
• Association Internationale pour l'Ostéosynthèse Dynamique (AIOD) [French and English versions.]
• l'Association d'Orthopédie du Québec [French language version, version Française.]
• Association for the Study and Application of the Ilizarov Method (ASAMI)
• Australian Orthopaedic Association [Including Directory of Orthopaedic Fellowships in Australia.]
• Australian Orthopaedic Foot and Ankle Society
• Australian Society of Orthopaedic Surgeons

[B to N]

• Belgian Arthroscopy Association
• Belgian Orthopaedic Trauma Association
• Carolina Orthopaedic Research Foundation
• European Federation for Surgery of the Hand [Requires subscription for some services but has interesting free FAQ Page and a worldwide Directory of hand surgeons belonging to various hand surgery societies.]
• European Society of Foot and Ankle Surgeons
• GICD [Groupe Internationale Cotrel Dubousset. Independent non-profit organization committed to providing worldwide educational services that advance expertise in spine surgery. Scientific Papers. Case Studies. Fellowships and Research Awards. Spinal Frontiers.]
• International Federation of Spine Associations
• International Society for Computer Aided Surgery
• Missouri State Orthopaedic Association [Still no longer available?]
• National Association of Orthopaedic Nurses [USA.]
• North American Spine Society
• North West Orthopaedic Trainees Association [Useful local information. Based in Manchester, UK.]
• NOV [Dutch and English language. Official home-page of the Dutch Orthopaedic Association. De Nederlandse Orthopaedisch Vereniging (NOV) is de beroepsvereniging van de Nederlandse orthopaedisch chirurgen.]

[O]

• Orthopaedic Laser Society of North America [Still no longer available?]
• Orthopaedic Research and Education Foundation [Rosemont, Il. Mission to foster, promote, support, augment, develop and encourage investigation into the causes, cure, and prevention of illnesses, injuries and conditions affecting the musculoskeletal system by providing funding.]
• Orthopaedic Research of Virginia
• Orthopaedic Research Society [Information about meetings and abstract submission guidelines.]
• Orthopaedic Research Society ROC [Taipei, Taiwan]
• Orthopaedic Trauma Association
• Orthopaedic & Trauma Foundation, Nepal

[P to Z]

• Piedmont Orthopaedic Society
• Regional Orthopaedics Association [Still no longer available?]
• Ruth Jackson Society [Primarily of women orthopaedic surgeons, residents, those serving fellowships and medical students with an interest in orthopaedics.]
• SITOP [Italian language. Official Site of the Italian Society of Paediatric Orthopaedics.]
• Société Belge de Chirurgie Orthopédique et de Traumatologie {English version.] and en français and in het Nederlands.
• Southern Orthopaedic Association

• American Academy of Orthotists and Prosthetists
• American Institute for Medical and Biological Engineering (AIMBE)
• American Physical Therapy Association
• American Registry of Radiologic Technologists
• Associated Students of Biomedical Engineering
• Australian Medical Association [Including State Branches.]
• Bioelectromagnetics Society [No longer available?]
• Biomedical Engineering Society
• Biophysical Society
• British Computer Society
• Canadian Medical Association
• Canadian Society of Orthopaedic Technologists
• Certified Orthotic and Prosthetic Advocates (COPA)
• Cleveland FES Center [Dedicated to promoting functional electrical stimulation.]

[D to H]

• Edison BioTechnology Center [Ohio, USA, non-profit organisation.]
• Engineering Foundation
• European Society of Biomechanics
• European Society of the Internet in Medicine
• Florida Association of Orthotists and Prosthetists
• Health and Safety Executive [United Kingdom]
• Health Canada / Santé Canada

[I to L]

• Institute of Electrical and Electronics Engineers (IEEE)
• IEEE Computer Society
• Institute of Physics [United Kingdom]
• Institute of Physics and Engineering in Medicine (IPEM)
• International Society for Prosthetics and Orthotics
• International Society of Biomechanics

• Technical Group on 3-D Analysis of Human Movement

  Working Group on Footwear Biomechanics

• International Spinal Injection Society [The diagnostic and therapeutic benefits of spinal injection procedures are discussed at this site. Includes news, related articles, ISIS member information, and an online discussion (newsgroup-type) page.]
• International Standards Organisation
• LifeNet [Organ procurement organisation, USA.]

[M to P]

• Medical Devices Agency [United Kingdom]
• Medical Research Council [United Kingdom]
• Medical Research Council of Canada
• Motion Plus User's Group
• National Association for the Advancement of Orthotics & Prosthetics [Formerly the American State of the Art Prosthetic Association]
• Orthotics & Prosthetics User's Forum

[R to Z]

• Rehabilitation Engineering and Assistive Technology Society of North American (RESNA)
• Royal Academy of Medicine in Ireland - Section of Bioengineering [Still no longer available?]
• Royal Australasian College of Surgeons
• Royal College of Physicians and Surgeons of Canada [Examining and regulatory body for orthopaedic surgeons in Canada.]
• Shriners [US service club which supports the Hospitals for Children, providing no-cost orthopaedic and burn care.]
• Société Française de Chirurgie de la Main [Mainly password protected, subscription for a fee.]
• United Amputee Services Association
• Department of Veterans Affairs [United States]
• World Health Organization