OP may refer to:
In the run-up to the United Kingdom general election, 2017, various organisations are carrying out opinion polling to gauge voting intentions.
Orpah Gail Winfrey (born January 29, 1954), better known as Oprah Winfrey, is an American media proprietor, talk show host, actress, producer, and philanthropist.
This page lists public opinion polls in connection with the 2017 French presidential election, which was held on 23 April 2017, with a run-off to follow on 7 May 2017, as no candidate secured an absolute majority of the vote in the first round.
An operating system (OS) is system software that manages computer hardware and software resources and provides common services for computer programs.
Opera (Italian: [ˈɔːpera]; English plural: operas; Italian plural: opere [ˈɔːpere]) is an art form in which singers and musicians perform a dramatic work combining text (libretto) and musical score, usually in a theatrical setting.
Opium (poppy tears, with the scientific name: Lachryma papaveris) is the dried latex obtained from the opium poppy (scientific name: Papaver somniferum).
Open-source software (OSS) is computer software with its source code made available with a license in which the copyright holder provides the rights to study, change, and distribute the software to anyone and for any purpose.