HQ9+ was designed by Cliff L Biffle, who wanted a language where the canonical programs (Hello World, 99 Bottles Of Beer and a quine) were easy to write. The language has four instructions -- H, Q, 9 and + -- which may occur in either uppercase or lowercase, as shown in the example in the specification..." (http://www.safalra.com/programming/esoteric-languages/interpreters/hq9-plus/)