Medicine

• Internal auditory canal or internal acoustic canal, an opening in the temporal bone of the skull which contains nerves running from the ear to the brain

Organizations

• Idaho Accelerator Center, Nuclear Physics Accelerator Laboratory, section of Idaho State University
  Idaho State University
  Idaho State University is a public university located in Pocatello, Idaho. It has outreach programs in Coeur d'Alene, Idaho Falls, Boise, and Twin Falls....
  
  
• Interstate Arms Corporation, a firearms company specializing in reproductions of repeating shotguns
• Interstate Athletic Conference
  Interstate Athletic Conference
  The Interstate Athletic Conference is an all-boys high school sports league made up of six private high schools in the Washington, D.C., area, competing in twelve varsity sports: baseball, basketball, cross country, football, golf, ice hockey, lacrosse, soccer, swimming and diving, tennis, track...
  
  , an all-boys high school sports league, is made of six private high schools in the Washington, DC area
• Interstate Aviation Committee
• International Astronautical Congress
  International Astronautical Congress
  Every year, the International Astronautical Federation together with the International Academy of Astronautics and the International Institute of Space Law , holds the International Astronautical Congress which is hosted by one of the national society members of the IAF.They are an annual meeting...
  
  
• IAC (company) (InterActiveCorp), an American conglomerate
• Inter-African Committee on Traditional Practices Affecting the Health of Women and Children
  Inter-African Committee on Traditional Practices Affecting the Health of Women and Children
  The Inter-African Committee on Traditional Practices Affecting the Health of Women and Children is a non-governmental organization which seeks to change social values and raise consciousness towards eliminating female genital mutilation and other traditional practices which affect the health of...
  
   which raises consciousness about female genital cutting
  Female genital cutting
  Female genital mutilation , also known as female genital cutting and female circumcision, is defined by the World Health Organization as "all procedures that involve partial or total removal of the external female genitalia, or other injury to the female genital organs for non-medical reasons."FGM...
  
   and similar issues
• International Academy of Cytology, an international organisation of cytologists and professional persons concerned with research in clinical cytology
  Cell biology
  Cell biology is a scientific discipline that studies cells – their physiological properties, their structure, the organelles they contain, interactions with their environment, their life cycle, division and death. This is done both on a microscopic and molecular level...
  
  
• International Action Center
  International Action Center
  The International Action Center is an activist group founded by former United States Attorney General Ramsey Clark. It supports anti-imperialist movements around the world, and opposes U.S. military intervention in all circumstances....
  
  , a leftist organization
• International Aerobatic Club
  International Aerobatic Club
  The International Aerobatic Club is a division of the Experimental Aircraft Association and the National Aeronautics Association...
  
  , which governs aerobatics
  Aerobatics
  Aerobatics is the practice of flying maneuvers involving aircraft attitudes that are not used in normal flight. Aerobatics are performed in airplanes and gliders for training, recreation, entertainment and sport...
  
   in the United States
  United States
  The United States of America is a federal constitutional republic comprising fifty states and a federal district...
  
   under the regulation of the Fédération Aéronautique Internationale
  Fédération Aéronautique Internationale
  The Fédération Aéronautique Internationale is the world governing body for air sports and aeronautics and astronautics world records. Its head office is in Lausanne, Switzerland. This includes man-carrying aerospace vehicles from balloons to spacecraft, and unmanned aerial vehicles...
  
  
• Instituto de Astrofísica de Canarias
  Instituto de Astrofísica de Canarias
  The Instituto de Astrofísica de Canarias is an astrophysical research institute located in Tenerife in the Canary Islands, Spain. It was founded in 1975 at the University of La Laguna.It operates two astronomical observatories in the Canary Islands:...
  
  , an astrophysical research institute based in the Canary Islands, Spain
• Irish Air Corps
  Irish Air Corps
  The Air Corps is the air component of the Defence Forces of Ireland providing support to the Army and Naval Service, together with non-military air services such as search and rescue and the Ministerial Air Transport Service...
  
  , the Aviation wing of the Irish Defense Forces
• Industrial Acoustics Company, the world's largest provider of noise and acoustic control products, structures and test facilities
• Industry Advisory Council
• Industrial Assessment Center
  Industrial Assessment Center
  Currently there are 26 Industrial Assessment Centers in the United States. These centers are located at particular universities across the US, and are funded by the Department of Energy as a means to spread ideas relating to industrial energy conservation....
  
  , a U.S. Department of Energy program which trains engineering students and provides free energy efficiency assessments to small manufacturers
• InterAcademy Council
• InterAmerican College

Other

• Idle Air Controller, a motor-driven valve which controls intake air to maintain idle RPM in internal combustion engines
• Immunoaffinity column, a column for preparation, separation or purification of biochemical mixtures
• Interactive Activation and Competition
  Interactive Activation and Competition
  Interactive Activation and Competition networks are neural networks used to model memory and intuitive generalizations. They are made up of nodes or artificial neurons which are arrayed and activated in ways that emulate the behaviors of human memory....
  
  , a kind of neural network
  Neural network
  The term neural network was traditionally used to refer to a network or circuit of biological neurons. The modern usage of the term often refers to artificial neural networks, which are composed of artificial neurons or nodes...
  
  
• International access code, in telecommunications
• Interapplication Communications, the previous name of Mac OS X's Apple events
  Apple events
  Apple events are the canonical message-based interprocess communication mechanism in Mac OS, first appearing in System 7 and supported by every version since then, including Mac OS X. Apple events describe "high-level" events such as "open document" or "print file", whereas earlier OS's had...
  
  
• Interpret As Command, a control character in the Telnet
  TELNET
  Telnet is a network protocol used on the Internet or local area networks to provide a bidirectional interactive text-oriented communications facility using a virtual terminal connection...
  
   protocol
• Image of the Absolute Conic, an entity of interest in computer vision
  Computer vision
  Computer vision is a field that includes methods for acquiring, processing, analysing, and understanding images and, in general, high-dimensional data from the real world in order to produce numerical or symbolic information, e.g., in the forms of decisions...
  
  
• Imperfect authentic cadence, in music
• International armed conflict