Swiss Post is striving to improve efficiency and is investing huge sums of money in the purchase of new sorting equipment.
In the next few months new machines will be installed in Switzerland's 39 sorting offices able not merely to sort by post code but to organise the letters in the order in which the postman will deliver them. But despite increased automation, human beings will still play an essential role. A report from the centre in Härkingen.
(All pictures Thomas Kern, swissinfo.ch)