| ACA | American Correctional Association |
| ACE | Asian Criminal Enterprise |
| ACS | Automated Case Support System |
| ACTS | DOJ Criminal Division Automated Case Tracking System |
| ADA | American with Disabilities Act |
| ADAM | Arrestee Drug Abuse Monitoring Program |
| ADR | Alternative Dispute Resolution |
| A-Files | Alien Files |
| AFIS | Automated Fingerprint Identification System |
| ALS | Automated Litigation Support |
| ANSIR | Automated Nationwide System for Immigration Review |
| AOC | Asian Organized Crime |
| APIS | Advance Passenger Information System |
| APSS | Asylum Pre-Screening System |
| ATF | Bureau of Alcohol, Tobacco, Firearms and Explosives |
| ATTF | U.S. Attorney's Anti-terrorism Task Force |
| ATR | Antitrust Division |
| BCI | Border Coordination Initiative |
| BESS | FBI (Part) B Extract Summary System |
| BIA | Bureau of Indian Affairs |
| BJA | Bureau of Justice Assistance |
| BJS | Bureau of Justice Statistics |
| BOP | Bureau of Prisons |
| BPETS | INS Border Patrol Enforcement Tracking System |
| BPV | Bulletproof Vest Program |
| BSST | Bridgeport Safe Street Task Force |
| CAC | Crimes Against Children |
| CAIS | Criminal Alien Information System |
| CAP | Cooperative Agreement Program |
| CASA | Court Appointed Special Advocate |
| CASES | Automated Case Management System |
| CCDO | Community Capacity Development Office |
| CCIPS | Computer Crime and Intellectual Property Section |
| CDF | Contract Detention Facilities |
| CEO | DOJ Criminal Division Child Exploitation and Obscenity Section |
| CERCLA | Comprehensive Environmental Response, Compensation and Liability Act |
| CFCs | Chlorofluorocarbons |
| CIA | Central Intelligence Agency |
| CIO | Chief Information Officer |
| CIRCLE | Comprehensive Indian Resources for Community and Law Enforcement |
| CIRG | FBI Critical Incident Response Group |
| CIS | Central Index System |
| CIS | COPS In Schools Program |
| CIV | Civil Division |
| CLAIMS | Computer Linked Application Information Management System (INS) |
| CLIP | Crime Lab Improvement Program |
| CMS | Case Management System |
| CODIS | Combined DNA Information System |
| COPS | Community Oriented Policing Services |
| CRM | Criminal Division |
| CRS | Community Relations Service |
| CRT | Civil Rights Division |
| CT | Counterterrorism |
| CTD | FBI's Counterterrorism Division |
| CY | Calendar Year |
| DACS | Deportable Alien Control System |
| DC | District of Columbia |
| DCPO | Drug Courts Program Office |
| DEA | Drug Enforcement Administration |
| DME | Durable Medical Equipment |
| DOD | Department of Defense |
| DOE | Department of Energy |
| DOI | Department of the Interior |
| DOJ | Department of Justice |
| DOL | Department of Labor |
| DOT | Department of Transportation |
| DTO | Drug Trafficking Organization |
| ECE | Eurasian Criminal Enterprise |
| eGov | Electronic Government |
| EID | INS Enforcement Integrated Database |
| EICMIM | ENFORCE Investigation Case Management and Intelligence Module |
| ENFORCE | INS Enforcement Case Tracking System |
| ENRD | Environment and Natural Resources Division |
| EOIR | Executive Office for Immigration Review |
| EOUSA | Executive Office for United States Attorneys |
| EOWS | Executive Office Weed and Seed |
| EPA | Environmental Protection Agency |
| EPIC | El Paso Intelligence Center |
| EREM | INS ENFORCE Removal Module |
| FAA | Federal Aviation Administration |
| FAIR Act | Federal Activities and Inventory Reform Act |
| FBI | Federal Bureau of Investigation |
| FBI HQ | FBI Headquarters, Washington, DC |
| FCI | Federal Correctional Institution |
| FCOD | Federal Convicted Offender Database |
| FDA | Food and Drug Administration |
| FDSS | Federal-wide Drug Seizure System |
| FEDBizOpps | Federal Data Procurement System Component |
| FEMA | Federal Emergency Management Agency |
| FinCen | Financial Crimes Intelligence Center |
| FIOA | Freedom of Information Act |
| FIPS | FOIA Information Processing System |
| FIREBIRD | DEA's primary office automation infrastructure |
| FISA | Foreign Intelligence Surveillance Act |
| FFL | Federal Firearm Licensees |
| FFMS | Federal Financial Management System |
| FMIS | Federal Management Information System |
| FPD | Federal Prisoner Detention |
| FPI | Federal Prison Industries |
| FTE | Full Time Equivalent (of one work year) |
| FY | Fiscal Year |
| G-8 | Eight major industrialized countries |
| GAO | General Accounting Office |
| GED | General Education Diploma |
| GIS | Geographic Information System |
| GISRA | Government Information Security Reform Act |
| GPEA | Government Paperwork Elimination Act |
| GPRA | Government Performance and Results Act |
| GREAT | Gang Resistance Education and Training |
| GSA | General Services Administration |
| HCFA | Health Care Fraud Act |
| HCIS | HCFA Customer Information System |
| HDS | Hazardous Devices School |
| HHS | Department of Health and Human Services |
| HIDTA | High Intensity Drug Trafficking Area |
| HMRU | FBI Hazardous Materials Response Unit |
| HQ | Headquarters |
| HRMIS | Human Resource Information System |
| HUD | Department of Housing and Urban Development |
| IAFIS | Integrated Automated Fingerprint Identification System |
| IBET | Integrated Border Enforcement Team |
| IBIS | INS Interagency Border Inspection System |
| IBIS | ATF Integrated Ballistics Identification System |
| ICAC | Internet Crimes Against Children |
| ICAD | Intelligent Computer Assisted Detection |
| ICLAD | INS Intelligence Computer Assisted Detection |
| ICM | Interactive Case Management System |
| IDENT-AIFIS | FBI Integrated Automated Fingerprint Identification System |
| IDMS | Integrated Data Management System |
| IFCC | FBI Internet Fraud Complaint Center |
| IFMIS | OJP's Integrated Financial Management Information System |
| IGA | Intergovernmental Agreement |
| IHP | Institutional Hearing Program |
| IIA | Intelligence Information Application |
| III | Interstate Identification Index |
| IIRIRA | Immigration Reform and Immigrant Responsibility Act of 1996 |
| IINI | Innocent Images National Initiative |
| IMSS | DOJ Information Management & Security Staff |
| INS | Immigration and Naturalization Service |
| INTERPOL | International Criminal Police Organization |
| IRM | INS Information Resource Management Staff |
| IRP | Institutional Removal Program |
| IRS | Internal Revenue Service |
| ISIS | INS Surveillance Intelligence System |
| ISRAA | Integrated Statistical Reporting and Analysis Application |
| IT | Information Technology |
| ITIM | Information Technology Information Management |
| IVRS | ATF's Integrated Violence Reduction Strategy |
| JCAHO | Joint Commission on Accreditation of Healthcare Organizations |
| JCN | Justice Communications Network |
| JCON (II) | Justice Consolidated Office Network (II) |
| JDIS | Justice Detainee Information System |
| JFK | John F. Kennedy (International Airport Code, NY, NY) |
| JMD | Justice Management Division |
| JPATS | Justice Prisoner and Alien Transportation System |
| JTTF | FBI's Joint Terrorism Task Force |
| JUMP | Juvenile Mentoring Program |
| KI/SSS | Key Indicator/Strategic Support System |
| LCN | La Cosa Nostra |
| LESC | Law Enforcement Support Center |
| LIONS | U.S. Attorneys Case Management System |
| LLEBG | Local Law Enforcement Block Grant |
| M&R | Modernization and Repair |
| MAR | FBI's Monthly Administrative Report |
| MECP | Missing and Exploited Children's Program |
| MERLIN | DEA's Intelligence Database |
| MET | Mobile Enforcement Team |
| MJTF | Multi-jurisdictional Task Forces |
| MLAT | Multilateral Legal Assistance Treaty |
| MORE | Making Officer Redeployment Effective |
| MOU | Memorandum of Understanding |
| N-FOCIS | ATF National Filed Office Case Management System |
| NAC | National Advocacy Center |
| NACARA 203 | Nicaraguan and Central American Relief Act, Section 203 |
| NAVAA | National Association of VOCA Assistance Administrators |
| NCIC | National Crime Information Center |
| NCIS | National Criminal Investigation Service |
| NCHIP | National Criminal History Improvement Program |
| NCJRS | National Criminal Justice Reference Service |
| NCMEC | National Center for Missing and Exploited Children |
| NDIC | National Drug Intelligence Center |
| NDIS | National DNA Index System |
| NFC | National Finance Center |
| NFTS | National Files Tracking System |
| NGO | Non-Governmental Organization |
| NIBIN | ATF's National Integrated Ballistic Information Network |
| NICS | National Instant Criminal Background Check System |
| NIIS | Non-Immigrant Information System |
| NIJ | National Institute of Justice |
| NIPC | National Infrastructure Protection Center |
| NIST | National Institute for Standards Technology |
| NPT | National Priority Target |
| NPTL | National Priority Target List |
| NPTO | National Priority Target Organization |
| NRC | National Records Center |
| NRT | National Response Teams |
| NSA | National Security Agency |
| NUMP | National Utilities Management Program |
| NWCC | National White Collar Crime Center |
| OCDETF | Organized Crime Drug Enforcement Task Force |
| ODP | Office for Domestic Preparedness |
| OFDT | Office of the Federal Detention Trustee |
| OFPP | OMB's Office of Federal Procurement Policy |
| OIA | Criminal Division's Office of International Affairs |
| OIG | Office of the Inspector General |
| OJJDP | Office of Juvenile Justice and Delinquency Prevention |
| OJP | Office of Justice Programs |
| OMB | Office of Management and Budget |
| OMB PART | OMB's Program Assessment Rating Tool |
| ONDCP | Office of National Drug Control Policy |
| OPCLEE | Office of the Police Corps and Law Enforcement Education |
| OPM | Office of Personnel Management |
| OPR | Office of Professional Responsibility |
| OSC | Office of Special Counsel |
| OSG | Office of the Solicitor General |
| OVC | Office for Victims of Crime |
| OVW | Office for Violence Against Women |
| PAL | Program Accountability Library |
| PAS | Performance Analysis System |
| PMA | President's Management Agenda |
| POC | Point of Contact |
| POE | Ports-of-entry |
| PRA | Paperwork Reduction Act |
| PRIDE | DEA Priority Drug Enforcement Initiative |
| PSN | Project Safe Neighborhood |
| PTARRS | DEA Priority Target Activity Resource Reporting System |
| PTDO | Priority Targeted Drug-trafficking Organization |
| PTS | BOP Prisoner Tracking System |
| QRT | Quick Response Team |
| QSIS | FBI Database tracking training in Quantico, VA |
| RAFACS | Receipt and Alien File Accountability and Control System |
| RAPS | Refugees, Asylum and Parole System |
| RCRA | Resource Conservation Recovery Act |
| RICO | Racketeer Influenced and Corrupt Organizations |
| RSAT | Residential Substance Abuse Treatment |
| SAC | Special Agent in Charge |
| SCAAP | State Criminal Alien Assistance Program |
| SEC | Securities and Exchange Commission |
| SENTRY | BOP on-line system |
| SEVIS | Student Exchange Visitor Information System |
| SG | Strategic Goal |
| SMART | Security Management and Report Tracking |
| SOD | Special Operations Division |
| SRO | School Resource Officer |
| SSA | Social Security Administration |
| STATE | United States Department of State |
| STOP | Services, Training, Officers and Prosecutors formula grants |
| TAP | TAP Pharmaceuticals |
| TAX | Tax Division |
| TaxDoc | Tax Division Database |
| TOP-OFF | Top Officials WMD Training |
| UHP | Universal Hiring Program |
| USA-5 | U.S. Attorney Data Collection System |
| USA/USAs | United States Attorneys |
| USA PATRIOT | Uniting and Strengthening America by Providing Appropriate Tools Required to Intercept Act and Obstruct Terrorism Act of 2001(HR 3162) |
| USAF | United States Air Force |
| USCG | United Sates Coast Guard |
| USCS | United States Customs Service |
| USMS | United States Marshals Service |
| USNCB | United States National Central Bureau (INTERPOL) |
| USPC | United States Parole Commission |
| USTP | United States Trustees Program |
| VA | Veteran's Administration |
| VAWA | Violence Against Women Act |
| VCCLEA | Violent Crime Control and Law Enforcement Act of 1994 |
| VOCA | Victims of Crime Act |
| VOI/TIS | Violent Offender Incarceration/Truth in Sentencing |
| VPN | Virtual Private Network |
| WAN | Wide Area Network |
| WCC | White Collar Crime |
| WIN | Warrant Information Network |
| WMD | Weapons of Mass Destruction |
| WTC | World Trade Center |
| YCGII | Youth Crime Gun Interdiction Initiative |