| ACS |
Automated Case Support |
| CIO |
Chief Information Officer |
| CAPPS |
Computer-Assisted Passenger Prescreening System |
| DHS |
Department of Homeland Security |
| EMA |
Encounter Management Application |
| FAMS |
Federal Air Marshal Service |
| FBI |
Federal Bureau of Investigation |
| FY |
Fiscal Year |
| GAO |
Government Accountability Office |
| ICD |
Interface Control Document |
| IT |
Information Technology |
| MOU |
Memorandum of Understanding |
| NCIC |
National Crime Information Center |
| NCTC |
National Counterterrorism Center |
| NORAD |
North American Aerospace Defense Command |
| OIG |
Office of the Inspector General |
| OSIS |
Open Source Information System |
| OTVC |
Office of Transportation Vetting and Credentialing |
| PIA |
Privacy Impact Assessment |
| RFA |
Request for Action |
| SORN |
System of Records Notice |
| TIDE |
Terrorist Identities Datamart Environment |
| TSA |
Transportation Security Administration |
| TSC |
Terrorist Screening Center |
| TSDB |
Terrorist Screening Database |
| TSOU |
Terrorist Screening Operations Unit |
| TWPDES |
Terrorist Watchlist Person Data Exchange Standard |
| VGTOF |
Violent Gang and Terrorist Organizations File |
