My office building recently replaced the directory in the lobby -- previously a back-lit display where you can slide pieces of printed plastic into and out of rows, such as a normal office building might use -- with a monitor that periodically changes between several screens of information.
Most of the screens list room numbers and their occupants. One of them lists contact information for the building staff.
The contact information includes e-mail addresses.
The e-mail addresses are blue and underlined.
Just to be perfectly clear about this: there is no input device.
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The what mentioned above is total fiction. Please don't take it seriously!