A testing system for a portable electronic device includes a sequential control card, a plurality of test devices, and a plurality of switches. A first software application at the computer creates and edits fonts. The POS system may print the code image on a transaction record provided to the customer, andor may display the code image on a display screen. The cover members includes a plurality of positioning features engaging the DIMM circuit card for positioning a portion of the DIMM circuit card within the socket-receiving channel. The nameserver generates a DNS response to the client device that includes the domain name information from the cached resource record. The second contacts include a second pair of differential contacts, a third pair of differential contacts, and a second grounding contact.