Harmonic Drive Systems, Inc. (HDSI, 株式会社ハーモニック・ドライブ・システムズ) is a company that provides motion control solutions for incorporation in industrial robots, semiconductor manufacturing equipment, and other systems. The company designs, manufactures, and sells rotary and linear actuators, speed reducers, gear heads and component sets, motors, and other products. Its products can be used in applications such as industrial, surgical, semiconductor wafer transport, humanoid robots, power assist suites, mobility and automated guided vehicles (AGVs), space rovers, etc.