The state of the art on robotic sensors is presented in this book, which contains the written record of the NATO Advanced Research Workshop (ARW) held in Maratea, Italy, August 28 - September 1, 1989, within the special programme on Sensory Systems for Robotic Control. Research in the area of robotic sensors is necessary in order to support a wide range of applications, including industrial automation, space robotics, image analysis, microelectronics, and intelligent sensors. This workshop focused on the role of traditional and non-traditional sensors in robotics. In particular, the following three topics were explored: - sensor development and technology, - multisensor integration techniques, - application area requirements which motivate sensor development directions. The workshop brought together experts from NATO countries to discuss recent developments in these three areas.