Open Door Prison Ministry Open Hands Prison Ministry Opening Gates Ministries Operation Christmas Child Operation Freedom Operation Mercy Ministries Operation Straight Line Operation Timothy Oratory of the Common Life Ordained ministry Order of Sir John Howard Oregon Corrections Intake Center Oregon State Correctional Institute Oregon State Penitentiary Oregon Women's Correctional Center Oregon Women's Prison Ministry Orient Correctionai Institution Orlando Christian Center Orleans Parish Prison Orthodox Chaplaincy of Prison of Belgium Orthodox Christian Prison Ministry Orthodox Zion Osborn Correctional Institution Osborn Prison Outreach Oshkosk Correctional Institution