What keyboard instrument uses vibrating air colums to produce sound?

The keyboard instrument that uses vibrating air columns to produce sound is the organ. In an organ, when a key is pressed, air is directed through pipes of varying lengths, creating different pitches based on the size of the pipe. The sound is generated by the vibration of the air column within these pipes. This mechanism distinguishes organs from other keyboard instruments like pianos, which produce sound through hammers striking strings.