The document discusses trombones and provides some key facts. It notes that the trombone means "large trumpet" in Italian, uses a slide instead of valves, and is in the bass clef. It then discusses the history of the trombone, including its first mention in 1488 and use in a wedding in 1468. Finally, it identifies the three main types of trombones - bass, tenor, and alto - and lists the eight instruments that make up the trombone family.