Opt

Look up opt, opt out, or opt-out in Wiktionary, the free dictionary.

Opt or OPT may refer to:

Computing

• /opt, a directory in the Filesystem Hierarchy Standard
• Option key, a modifier key on Apple keyboards
• Optimal page replacement algorithm, one of the page replacement algorithms for swapping out pages from memory

Other uses

• Occupied Palestinian Territories
• Optical projection tomography, a technique to create three-dimensional images of small objects
• Optional Practical Training, a temporary employment authorization for F-1 students
• Optimized Production Technology, a production planning system created by Eliyahu M. Goldratt
• Optimum Population Trust, former name of the UK charity Population Matters which tackles overpopulation
• Oral pressure therapy, a treatment for obstructive sleep apnea (OSA)
• Overseas Passenger Terminal, Sydney
• Outdoor Payment Terminal

See also

• Opt-out, to avoid receiving unsolicited product or service information
• Opting out, a political expression in Canada, describing the intention of a province to remove itself from a program administered by the federal government
• Opt in email, the option to receive bulk e-mail
• ORT (disambiguation), an acronym in Russian and Greek which appears like OPT