ITL

ITL can refer to:
 * International Territorial Level, geographic classification in the United Kingdom.
 * Imaging Technology Laboratory, part of the University of Arizona's Steward Observatory
 * In the Labyrinth, a role-playing system built on The Fantasy Trip
 * Inferential theory of learning
 * Information Technology Limited, a British computer company of the 1980s (formerly CTL)
 * Information Technology Laboratory, a NIST laboratory since 2010
 * Institute of Technology Law, National Chiao Tung University a law school in Taiwan
 * Interval Temporal Logic, a temporal logic
 * Islamic Tools and Libraries, a subproject of Arabeyes software which provides Hijri dates, Muslim prayer times and Qibla
 * Italian lira, the former currency of Italy that had ISO 4217 code ITL
 * Iterative test-last, opposite of iterative test-first software development process
 * Estonian Association of Information Technology and Telecommunications, abbreviated in Estonian as ITL
 * ITL, Russian-language abbreviation for "correctional labor camp", used in the names of GULAG labor camps