A Sense is an interface that has input and output. A Sense interprets with a stimulus and converts the stimulus representation into Vertex and Relationship objects to be processed by the Mind. A Sense can also interact with a stimulus and convert Vertex and Relationship objects into stimulus.
Pandora can have the classic biological senses, speech, vision, hearing, touch, but because she lives in cyberspace, not our physical world she has other senses, which are typically more useful to her. Http, email, chat, Facebook, Google are all possible senses.