O.R. is an abbreviation for:

The abbreviation O.R. stands for "own recognizance." In the context of law enforcement and the judicial system, being released on one's own recognizance means that a person is allowed to leave custody without having to pay bail, based on a promise to return for their court dates. This practice is often applied to individuals who are deemed to be low flight risks, indicating that they are likely to appear in court as required. It's a sign of trust in the individual's responsibility to adhere to the legal process rather than requiring monetary stipulations for their release. This approach can help alleviate jail overcrowding and is guided by considerations of the individual's criminal history, community ties, and the nature of the charges.

The other choices do not accurately represent the legal term or concept that O.R. signifies in law enforcement practices.