An exercise andor rehabilitation machine includes a support having a rounded upper surface for supporting a person’s anterior pelvic area. Said label printer cassette comprises at least one supply of printing medium and a housing. To take advantage of benefits of ingress filtering as it is gradually deployed by ISPs around the Internet, differentiated classes of service are used to transport packets whose source address can be trusted and packets whose source address cannot be trusted. A translucent insulator layer, wire grid polarizer, a second translucent insulator layer and light sensing diode region are, in turn, attached to the second translucent metal layer. The memory device comprises means for determining the at least one parameter, a calibration memory connected with means for determining the correction factor, and control circuits for adjusting pulse parameters as applied to read and write operations in the memory device.