The trombone, unique among brass instruments for its slide mechanism, has been a staple in orchestras, jazz bands, and marching ensembles since the Renaissance. Known for its smooth glissando and powerful tone, it plays both melodic and harmonic roles. Notable models include the Bach 42B, Yamaha YSL-882O, Conn 88H, and King 3B. Trombones are used in a variety of musical styles, from classical symphonies to jazz improvisation and contemporary brass ensembles.