Prisons History 48 Prison administration 18 Prisoners 17 Corrections 16 Criminal justice, Administration of 10 Imprisonment 10 Punishment 10 Social conditions 9 Privatization 8 Officials and employees 7 Overcrowding 7 Politics and government 7 Contracting out 6 Political prisoners 6 Social aspects 6 Alternatives to imprisonment 5 Concentration camps 5 Forced labor 5 Government policy 5 Discrimination in criminal justice administration 4 African Americans 3 Construction 3 Crime 3 Crime and criminals 3 Electronic surveillance 3 English fiction 3 History and criticism 3 Prison psychology 3 Prisons in literature 3