Prisons 29 Prisoners 28 History 20 Political prisoners 18 Women prisoners 18 Prion, Viral, Bacterial and Fungal Pathogens of Animals, (New March 2000) 16 Criminal justice, Administration of 15 Punishment 15 Prion, Viral, Bacterial and Fungal Pathogens of Humans, (New March 2000) 14 Politics and government 13 Women 13 Man 12 Human diseases 11 Female offenders 10 Human rights 10 Philosophy 10 Criminals 9 Microbiology 9 Social Sciences 9 Social conditions 9 Biography 8 Corrections 8 Criminology 8 Disease control 8 Feminism 8 Imprisonment 7 Molecular biology 7 Prisoners of war 7 Protozoan, Helminth, Mollusc and Arthropod Parasites of Animals, (New March 2000) 7 R (Computer program language) 7