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We have created and prototyped a set of novel interface systems ranging from a photo story-sharing table called PDH ( Personal Digital Historian ) to the DiamondSpin tabletop tool kit , and UbiTable , to interaction concepts including CoRDs , Modal Spaces , Glimpse multi-level input model . StarView also provides an interface to the Visual Target Tool ( VTT ) in the Astronomer 's Proposal Tool ( APT ) suite of programs .