A system is described for rearranging data units of a data word in accordance with a mask word, the mask word having a plurality of mask bits each associated with a data unit, each mask bit having one of a set condition or a clear condition. A method of monitoring temperature in a system, such as a capacitor bank, is disclosed. A shipper identifies a shipment using a shipment identifier. The PSA can exhibit a peel strength between around 2-8 psi at temperatures between around 180-250 degrees Fahrenheit.