This presentation summarizes key aspects of the corrections system including criminal justice processes, jails and prisons, probation and parole, juvenile corrections, and community-based corrections. It outlines the booking, assessment, and release processes for jails and prisons. It also discusses trends toward alternative and community-based corrections. Finally, it reviews functions like security, education and treatment programs, and concludes that understanding both criminal justice and non-criminal justice personnel is important for policy implementation.