Data hiding is a general concept in computing which demands that data that is important for state-keeping only is hidden from the user. In other words, the user 'sees' only the data necessary or relevant for him; everything else is hidden.
... the south part of the island. From the 32,000 Russians (of whom over 22,150 were convicts) at the beginning of 20th century, the population grew to 673,100 today, 83% ...