A wallet for retaining a plurality of cards. The auger is disposed in a tube, and does not require cylindrical bearings at its ends. The drive shaft and hub can be locked against rotation, or not, by a lock that is mechanically connected to a cylinder cam rotated by a key. CPU throttling enables a user to control the amount of time the local data storage unit will wait prior to returning control to applications after an update. In order to prevent the steam flow from carrying away part of the feed material, the apparatus includes an expansion chamber, through which the escaping steam flow is channeled, and the flow-through cross section of which is such that it causes the steam flow to decelerate.