title: Free space (disambiguation)
text: # Free space (disambiguation)
  
  Free space may refer to:
  
  * A perfect vacuum, that is, a space free of all matter
  * In electrical engineering, free space means air (as opposed to a material, transmission line, fiber-optic cable, etc.):
     * Free-space optical communication is communication by shining light through air
     * Free-space path loss, the spreading-out of light as it travels through 3D space
     * Free-space display is a 3D display projected into the air, often with the help of mist
  * Autonomous free space, community centers in which non-authoritarians enact principles of mutual aid
  * Social centre the free shared space in a community
  * Descent: FreeSpace – The Great War, a space combat simulation computer game
  * The area of a data storage device (for example, a computer disk drive) that is still available for more data storage
  * Motion planning § Free space, the subset of a configuration space where a robot will not collide with obstacles
  