A container data center includes a container defining a number of inlets, a number of server systems received in the container. The encapsulated medical device is passed through the lumen of a body cavity in order to examine, cure, or treat an internal region of the body cavity under the control of the extracorporeal device. A first percentage of the plurality of text boxes whose locations on the plurality of frames fall into a location range may be obtained. One implementation allows the second on-line service entity to provide services to the users associated with the first on-line service entity in a seamless manner without the first on-line service entity having to proxy the session between the second online service entity and the users. The variance verification component can provide error information, if the specified variance is not safely compliant Variance verification can be based on static checking which places the burden on a source language compiler to emit the run-time checks in intermediate language, if run-time checked variance is required. The main pole has a first, a second, a third and a fourth side surface.