A therapeutic bolster for applying a constant pressure or a rolling massage to a body portion which simulates the touch of a human thumb or palm. The source image, such as a web page, and its associated video content are retrieved and separately encoded. In some embodiments, the customer interface means may be a specially-adapted chip and PIN card reader apparatus. Such arrays may be employed to detect a presence andor concentration changes of various analyte types in a wide variety of chemical andor biological processes. Thus, the second, limited token does not have all privileges associated with the first, full token but instead has a limited set of privileges and not extra privileges that could be employed to take actions that would be harmful, deceptive, or malicious. Therefore, discomfort a user feels because of distortion can be reduced.