title: Virtual Fixtures from Rosenberg
body: <p>this is not a technical question, but I've read multiple times now, that Virtual Fixtures, developed from L.B. Rosenberg in 1992, is one of the first augmented reality applications. I would like to know a little bit more about this Virtual Fixtures, but I cannot see any informative website about this "application". Can someone explain to me, what Vitural Fixtures is about? Are there any good literature sources available? The only thing i found with google are summaries of the history from ar - Nobody explains Virtual Fixtures.</p>
  
  <p>Thanks a lot</p>
  
  <p>Edit: Also a picture about the system would also be useful :)</p>