Robots can be defined as programmable, self-controlled devices consisting of electronic, electrical, or mechanical units. The first modern robots were used in factories as industrial robots to allow production without human assistance. Leonardo da Vinci sketched plans for a humanoid robot in the 15th century. Robots will eventually be able to communicate with humans through speech, gestures, and facial expressions. TOPIO is a humanoid robot designed to play table tennis against humans, standing 188 cm tall and weighing 120 kg. Robotics involves the design, construction, and use of machines to perform tasks traditionally done by humans.