A family field guide
BOP Glossary
Plain-English explanations of common terms families may hear while navigating a federal prison sentence. Each entry points to related information from the Bureau of Prisons.
- BOP
The Bureau of Prisons (BOP) is the federal agency responsible for operating federal prisons and caring for people in its custody.
BOP source: About the Federal Bureau of Prisons- BOP Register Number
A number the BOP uses to identify a person in its records. It can be used to find a record in the federal inmate locator.
BOP source: About Federal Inmate Records- Commissary
The institution store and related trust-fund account system for approved purchases or services beyond what the institution provides. Offerings vary by facility.
BOP source: Trust Fund/Deposit Fund Manual (PDF)- Designation
The BOP process for assigning a person to an institution. It considers security classification, health care, programs, and administrative factors.
BOP source: BOP Designations- Federal prison types (FCI, FPC, USP)
FCI means Federal Correctional Institution, FPC means Federal Prison Camp, and USP means United States Penitentiary. These names describe facility categories, but an acronym alone does not explain every detail of an individual placement.
BOP source: BOP Federal Prisons- Federal Time Credits (FTC)
Under the First Step Act, some eligible people may earn time credits for participating in qualifying programs or productive activities. The BOP determines eligibility and how earned credits may be applied.
BOP source: First Step Act Frequently Asked Questions- First Step Act (FSA)
A federal law with provisions related to BOP programming, good-conduct time, and federal time credits, among other subjects.
BOP source: BOP First Step Act- Good Conduct Time (GCT)
A sentence credit eligible people may earn for good behavior under federal rules. Eligibility and individual calculations depend on the law and sentence that apply.
BOP source: First Step Act Frequently Asked Questions- Residential Drug Abuse Program (RDAP)
The BOP’s most intensive substance-use treatment program, delivered in a residential setting. Participation and any sentence reduction are not guaranteed; eligibility and decisions are individual.
BOP source: BOP Inmate Substance Abuse Treatment- Residential Reentry Center (RRC)
A contracted, supervised community placement—often called a halfway house—that may provide support and structure near release. The BOP decides placements individually.
BOP source: BOP Residential Reentry Management Centers- Security level
A category the BOP uses to describe institution security features and guide placement. A facility’s label alone does not guarantee the exact conditions or housing of an individual.
BOP source: BOP Federal Prisons- Sentence computation / projected release date
The BOP calculates a sentence using applicable federal law and policy. An online projected release date is not a legal opinion and may change as calculations or circumstances change.
BOP source: BOP Sentence Computations- Special Housing Unit (SHU)
A Special Housing Unit is restricted housing used for different administrative or disciplinary reasons. The reason, conditions, and length of stay can differ from person to person.
BOP source: BOP Restricted Housing Statistics- TRULINCS
The BOP’s controlled electronic messaging system for exchanging messages with approved contacts. Use is subject to restrictions and monitoring.
BOP source: BOP Community Ties and Communications- Unit Team
The institution staff group that handles program reviews and other case-related matters. It may include a unit manager, case manager, and counselor.
BOP source: BOP Residential Reentry Management Centers