The APO Hiking Society, composed of Danny Javier, Jim Paredes, and Boboy Garrovillo. Their albums were released from 1974 to early 2000, included many hit songs such as "When I Met You", "Panalangin", "Batang-Bata Ka Pa", "Yakap Sa Dilim", "Pumapatak Ang Ulan", "Ewan", "Awit Ng Barkada", "Mahirap Magmahal Ng Syota Ng Iba", "Paano", "Pag-ibig", "Nakapagtataka", "Show Me A Smile", "Blue Jeans", "Tuyo Na'ng Damdamin", "Kumot At Unan", "Kaibigan", "Sa'n Na Nga Ba'ng Barkada Ngayon", and "Doo Bi Doo". APO started out as a large high school vocal group at the Ateneo de Manila High School but was later reduced to a trio consisting of Danny, Jim, and Boboy, which achieved great success during the 1980s, 1990s and 2000s, as Danny Javier coined the term OPM or Original Pilipino Music in the late-70's. In December 2009, APO announced its plans for retiring from active performance, citing "diminished creative processes". After a series of warmly-received concerts in February to May 2010, the group officially retired on June 30, 2010 after they perform in the Inauguration of President Benigno 'Noynoy' Aquino III. Kami nAPO Muna, a tribute album, is a latter-day release.
