harp
Plucked stringed instrument consisting of strings of various lengths attached to a triangular frame.
sound box 
The hollow part of the instrument; it amplifies the sound vibrations produced by the strings.
soundboard 
The upper face of the sound box, which receives the vibrations of the strings.
pillar 
Upright that connects the sound box to the neck; its metal rods join the pedals to the mechanism inside the neck.
string 
Made of gut, nylon or metal; its vibrations are transferred to the soundboard.
neck 
The upper section of the harp; it anchors the tuning pegs and contains a mechanism that changes the pitch of the strings by a semitone.
tuning peg 
Piece of wood or metal that rolls the end of a string to adjust its tension to obtain the exact note.