The criminal justice system has its own language and navigating it without a guide is disorienting for families encountering it for the first time. This section covers the terminology that appears in court documents, facility communications, and case records, from the difference between jail and prison to what terms like disposition, detainer, adjudication, and supervised release actually mean in plain language. It also covers general questions about how prisons and jails operate, what a typical day looks like inside, how different security levels function, and what the practical differences are between federal, state, county, and private facilities. The answers here are written for people who have no prior experience with the system and need clear accurate explanations without legal jargon. If you encountered a term you did not understand this is the right place to start. See also our sections on Law Questions and Legal Terms, and Sentencing Questions.