OPT

OPT or Opt may refer for:

Computing

 * /opt, a directory in the Filesystem Hierarchy Standard
 * Option key, a modifier key on Apple keyboards
 * OPT, the theoretically optimal page replacement algorithm, a page replacement algorithm for swapping out pages from memory

Other uses

 * Occupied Palestinian territories, another name for the Palestinian territories of the West Bank and Gaza Strip
 * Ocean Power Technologies, a US owned renewable energy company
 * Office des postes et télécommunications, especially in French Polynesia (Office des postes et télécommunications de Polynésie française) and in New Caledonia
 * Operation Prime Time, a consortium of TV Stations to provide alternative prime time programming
 * Optical projection tomography, a form of tomographic tissue imaging used in biomedical research
 * Optional Practical Training, a period during which university students with an F-1 are permitted by the United States Citizenship and Immigration Services (USCIS) to work for one year on a student visa without needing an H-1B
 * Optimized Production Technology, a production planning system created by Eliyahu M. Goldratt
 * Outdoor Payment Terminal, a name sometimes used for the self-service user interface hardware at fuel stations
 * Oral pressure therapy, a treatment for obstructive sleep apnea
 * Overseas Passenger Terminal, Sydney
 * Obshchestvennoye Rossiyskoye Televideniye (Общественное Российское Телевидение, ОРТ in Cyrillic script), the former name of Channel One Russia, a public broadcaster in Russia
 * Oxford Placement Test