(Google translation + some manual correction)

If scientists in their offices can no longer recover from a mess, they
have two possibilities: to clear up, or to invent a remedy.  Jiwon Kim
of the University of Washington decided together with two colleagues
for the latter - and developed a system, which notes the discovery
site of each paper.  In addition the researchers employed an untiring
observer in the form of a camera, which is attached at a computer.
The computer constantly analyzes what the video sees, and tracks what
the user does with all the documents on the desk.  "On the question
'where is my tax form?' the PC describes, in which place of which pile
it saw the paper last," Kim explains the procedure.  The prototype of
the system is however still limited: "the user may only move one
document at a time from one place to another," says Kim, "however in
three to four years the system should be suitable for use in practice."