A method and apparatus for buffering 2-dimensional graphical image data to be supplied to a scrolling display controller. Also, methods and devices for slowing gastric emptying involve placing valves within the stomach cavity near the gastro-intestinal junction andor the pylorus. The non-wired areas have a major area of the upper surface of the mass portion and are lower than the wired areas. In this way, the operator of the online commerce site may prioritize server access per service level agreements based on a specific third party application and API function call.