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The HOAP series should not be confused with the HRP series (also known as Promet).
In 2001, Fujitsu realized its first commercial humanoid robot named HOAP-1. The HOAP-2 was released in 2003 followed by the HOAP-3 in 2005.
Specifications of HOAP-2
- Height: 1 ft 7 in (48 cm)
- Weight: 15 lb (6.8 kg)
- HOAP-2 system consists of the robot body, PC and power supplies.
- The PC OS uses RT-Linux (open C/C++language)
- Smooth movement became realized because the electric current control of motor was possible(except neck and hand).
- USB interface for the internal LAN makes modification or addition of new actuators and sensors easily accomplished.
- The neck, waist and hands now have movement capability. Smooth movement can be realized now.
- Easy to program and simple initial start up using sample program, included with Robot purchase.
Capabilities of HOAP-2
HOAP-2 has been demonstrated with capabilities to successfully perform the following tasks, among others:
- walking on flat terrain 
- performing sumo movements
- cleaning a whiteboard
- following a ball
- grasping thin objects, such as pens, brushes, etc.
-  Archived June 16, 2008, at the Wayback Machine.
- "Miniature Hunamoid Rrobot HOAP-3" (PDF). Fujitsu. Archived from the original (PDF) on 2012-10-24. Retrieved 2011-06-14.
-  Archived September 30, 2011, at the Wayback Machine.
- "https://www.youtube.com/watch?v=vZYaW9_haiU". HOAP-2 learns to walk through imitation video on YouTube. Retrieved 2011-03-19. External link in
- "https://www.youtube.com/watch?v=j1sQ9ZK3l9w". HOAP-2 performs sumo movements video on YouTube. Retrieved 2011-03-19. External link in
- Kormushev, Petar; Nenchev D.N.; Calinon S.; Caldwell D.G. Upper-body Kinesthetic Teaching of a Free-standing Humanoid Robot (PDF). IEEE International Conference on Robotics and Automation (ICRA 2011). Retrieved 2011-03-19.
- "https://www.youtube.com/watch?v=bVH1E5gGLf8". HOAP-2 robot learns to clean a whiteboard video on YouTube. Retrieved 2011-03-19. External link in
- "https://www.youtube.com/watch?v=LPYjXQHv2Gs". HOAP-2 follows a ball video on YouTube. Retrieved 2011-03-19. External link in
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