Through the media, we are constantly and intensively confronted with the consequences of conflicts and natural disasters. On a daily basis our TV and newspapers show throngs of refugees trying to escape the violence of war or masses of unsettled people trying to survive prolonged drought, earthquakes or flooding. When such disaster strikes, international associations like the Red Cross, several United Nations organisations, private institutions and neighbouring countries try to harbour the displaced, often in improvised shelters. Frequently, these shelters become camps and if the situation does not essentially improve within a reasonable time, because the war goes on or reconstruction fails to develop, these camps grow into semi-permanent settlements in which refugees may stay for years. In such refugee camps, which may be inhabited by immense masses, there is a lack of everything. One of the reasons why so many things go wrong in these environments is faulty communication resulting from language barriers, illiteracy and cultural differences. Vast numbers of people must be aided quickly while there are generally too few helpers with too little means to do so effectively. The ensuing waste of time and energy literally costs lives.