IRT

IRT or irt may refer to:

Organizations

For teams, see § Other uses.

• Indiana Repertory Theatre, an American company of actors
• Institut für Rundfunktechnik, a German research institute for broadcasters
• Interborough Rapid Transit Company, a defunct New York subway operator

Science and technology

• Imagery Rehearsal Therapy, see Nightmare disorder § Treatment
• Immunoreactive trypsinogen, newborn screening test for cystic fibrosis
• Infrared thermography
• Infrared Telescope, on the STS-51-F Space Shuttle mission
• Item response theory, to interpret psychometric tests

Television

• Ice Road Truckers , a reality television series
• International Response Team, a fictional body in Criminal Minds

Other uses

• IR Tanger, a Moroccan association football club
• Incident response team, a group of people who respond to an emergency
• International Registry of Tartans, a Scottish Tartans Authority textile database