The document lists and categorizes various percussion instruments from around the world. It divides instruments into those that produce indefinite sounds made of wood, metal, or membranes, and those that produce definite sounds made of plates of wood or metal. Some of the instruments listed are rain sticks, kendhang, djembe, berimbau, gopîyantra, angklung, ximbomba, claves, maracas, Chinese boxes, güiros, castanets, cymbals, triangles, tambourines, bongos, congas, drums, carillons, metallophones, and xylophones.