US Federal Government Agencies:

Department of Defense Federal Acquisition Regulation Supplement (DFARS)
Department of Education Acquisition Regulation (EDAR)
Department of Energy Acquisition Regulation (DEAR)
Department of Health and Human Services Acquisition Regulation (HHSAR)
Department of Homeland Security Acquisition Regulation (HSAR)
Department of Housing and Urban Development Acquisition Regulation (HUDAR)
Department of Justice Acquisition Regulation (JAR)
Department of Labor Acquisition Regulation (DOLAR)
Department of State Acquisition Regulation (DOSAR)
Department of the Air Force Federal Acquisition Regulation Supplement (AFFAR)
Department of the Army Acquisition Regulations (AFAR)
Department of the Interior Acquisition Regulation (DIAR)
Department of the Navy Acquisition Regulations (NMCAR)
Department of the Treasury Acquisition Regulation (DTAR)
Department of Transportation Acquisition Regulation (TAR)
Department of Veterans Affairs Acquisition Regulation (VAAR)
Environmental Protection Agency Acquisition Regulation (EPAAR)
General Services Administration Acquisition Regulation (GSAR)
National Aeronautics and Space Administration Federal Acquisition Regulations Supplement (NASA and NFS)
National Science Foundation
Nuclear Regulatory Commission Acquisition Regulation (NRCAR)
Office of Personnel Management Federal Employees Health Benefits Acquisition Regulation (FEHBAR)
Office of Personnel Management Federal Employees’ Group Life Insurance Federal Acquisition (LIFAR)
Social Security Acquisition Regulation (SSAR)
U.S. Agency for International Development Acquisition Regulation (AIDAR)