Q:

What does "zu Hause" mean in this context?

This fragment comes from a text about an Internet cafe: 

An allen verfügbaren Computern kann man online die neusten Zeitungen lesen, mit anderen Leuten "chatten" oder sich zu Hause in angenehme Erinnerung bringen.

So my question is, why the expression zu Hause appears out of the sudden when the text is about things one can do at the cafe?

A:

It means that you can send a sign of life, as it were, to those at home (while travelling, say).

