Cameroon. Yaounde. Lycée technique Ekounou. PSI ( Population Services International) is a NGO (Non Government Organisation) which has one main program in Cameroon: the PMSC (Programm Marketing Social Cameroon). Peers educators visit schools and perform sketches on Aids sensibilisation. Pupils answer questions on Aids prevention and can win prizes like caps, tshirts and pens. © 2001 Didier Ruef