Proof of concept
Whom do I contact regularly and how?
Which application runs the most frequently?
What are the most frequent keywords I use?
Which kind of smiley is related to which context?
How do I communicate throughout the day / week / year?
What are the links stored on my iPhone?
What are the places I visit?
How quickly do I respond to communication from others?
What kind of music have I been listening to?
Lectures, exhibitions, articles