HRB explained

HRB may refer to:

• HRB (gene)
• HRB Systems, an American defense contractor
• Boeing HRB-1, a helicopter
• Croatian Revolutionary Brotherhood (Croatian: Croatian: Hrvatsko revolucionarno bratstvo)
• FBI Human Resources Branch, US
• H&R Block, NYSE symbol
• Harbin Taiping International Airport, Heilongjiang, China
• Health Research Board, Ireland
• House of Responsibility, in Hitler's birth house, Braunau am Inn, Germany
• HRB, a Rockwell scale of materials' hardness