An adjustable armrest for a chair is disclosed herein and comprises an assembly of a mounting plate, a mounting base, and two arms. A memory address translation data structure may be accessed, for example, in connection with a memory access request for data in a memory page, such that attributes associated with the memory page in the data structure may be used to control whether data is swizzled, and if so, how the data is to be formatted in association with handling the memory access request. Disposed in the processing stations are spatially fixed positioning means which cooperate with corresponding positioning means on the carriage and shift the carriage, without having recourse to any other driving source than the movement of the carriage itself in the processing station, into the exact position which is necessary for processing the workpiece in the said processing station. A piezoceramic actuator provides power to rechargeable batteries in the container control unit.