Several systems have investigated the value of various kinds of
awareness cues, such as location, status, etc., for constructing a
picture of others’ situation and status. Context-Phonebook [13]
displayed location (‘at work’, ‘at home’ and ‘on the move’) and a
simple red-green-yellow availability marker next to contacts in a
mobile phonebook. These simple awareness cues were themselves
found to be very useful for the majority of people. In fact, several
studies [12][1] have noted that to friends or good acquaintances,
even simple or incomplete awareness cues are imbibed with a lot
of meaning, which they are able to interpret to make fairly
accurate judgments about the other person’s situation.