A load balancing method classifies requests routed by a client computer to a server computer as either idempotent or non-idempotent requests. Prior to selection and delivery of content to a mobile device by a personal computer, content is predictively retrieved from storage at the computing device. An adjustive component is rotatably mounted to the rear wall of the housing. Furthermore, the card provides a number of avenues for the card owner to express themselves, including an array of affiliation symbols, a most recent mood symbol, and a text field. The receivers receive the RF power signals and convert the RF power signals into direct current. The invention also provides processes for manufacture of said compounds, compositions containing them and processes for manufacturing such compositions.