The Locust infared system provides location information and
messaging without batteries and without its own network. The system is
``privacy aware'' in that it supplies information to the wearable
computer user who can then control how much of this information is
shared with others or the installed infrastructure. By combining
the abilities of Locusts with an appropriately equipped wearable
computer, the user can interact with web-like hyperlinks, graphics,
and sounds virtually associated with objects in the physical world.
In addition the user can annotate and change these links as desired.