Techniques for inter-frequency neighbor list searching are disclosed. An aryl compound in which a hydrogen atom is bonded to at least one of the carbon atoms of the aryl group, and a sulfoxide compound which can be expressed by the formula: R1 SO R2 are reacted in the presence of a strong acid which can be expressed by the formula: HMXmYn. At least two analog drive signals are synthesized based on the multi-bit digital representation. The receiving tray is configured to rotate from a first orientation disposed at an acute angle to a front face of the housing to permit engagement of the tablet computer with the receiving tray, to a second orientation that is substantially parallel to the front face of the housing and that prevents removal of the tablet computer from the receiving tray. New data fields in an RFC compliant message header are read by the e-mail programs handling the message, the fields identify the message originator as one that should have its subsequent retransmission notified to the originator.