PA1 or PA-1 may refer to: Pad Abort Test 1, a 1963 Apollo test flight Pad Abort 1 (Orion), a 2010 Orion test flight
Pennsylvania state route 1, a former state highway near Philadelphia U.S. Route 1 in Pennsylvania Muhammed Akbar Khan, Pakistan Army general ALCO PA, train locomotive The PA1, a type of rolling stock used on the PATH train in New York and New Jersey PA-1 (cell line), a human ovarian cancer cell line PA1 key, on the IBM 3270 keyboard Loening PA-1, American fighter aircraft prototype