HRF may refer to: Croatian Radio Festival (Croatian: ) Haemodynamic response function Haiti Reconstruction Fund Heterocyclic ring fission, a fragmentation scheme in mass spectrometry; see A-type proanthocyanidin Homeland Reserve Forces, a branch of the Republic of Korea Reserve Forces Hostage Rescue Force, an Egyptian police unit Hostile Resting Face, an unintentionally annoyed-looking facial expression Human-Readable Format Human Relief Foundation Human Rights First Human Rights Foundation Human Rights Foundation (New Zealand) Swedish Hotel and Restaurant Workers' Union (Swedish: ) Hailemariam and Roman Foundation