A memory device comprising a first electrode having a top side, a second electrode having a top side and an insulating member between the first electrode and the second electrode. In the method according to the invention, an operating device is displaced in a displacement position to a predetermined shelf position, at least one medication package on a shelf belonging to the shelf position is moved with a gripping device in the direction of a support and it is then checked whether the at least one medication package has moved fully onto the support. An event example is \u201cbeing a vehicle’s driver\u201d and attempting to do the app of texting.