- Strings: This is the largest section of the orchestra and includes violins, violas, cellos, and double basses.
- Woodwinds: This section includes instruments such as flutes, oboes, clarinets, bassoons, and sometimes saxophones.
- Brass: This section includes instruments such as trumpets, trombones, French horns, tubas, and sometimes a flugelhorn.
- Percussion: This section includes instruments such as timpani, bass drum, snare drum, cymbals, and a variety of other auxiliary percussion instruments.
Additionally, some orchestras may include a harp, a piano, or an organ.