The British Aircraft Corporation One-Eleven, also known as the BAC-111 or BAC 1-11, was a British short-range jet airliner of the 1960s and 1970s. It was the second short-haul jet airliner to enter service, following the French Sud Aviation Caravelle. The aircraft was also licence-produced in Romania during the 1980s as the ROMBAC One-Eleven.