D. LNS Clients
We have implemented a smartphone client application to
display information from LNS on the Twitter client in a
unified location using the above-mentioned LNS API (figure
3). The three messages the LNS is displaying in the figure
are messages acquired from the LNS API. From top to
bottom are messages sent from an intercom system, fax
machine, and scale. A picture of a visitor taken by the
intercom system and a PDF of the fax that was received can
be checked. The message at the bottom is a message from
Twitter. We conducted a subjective survey among general