Techniques are described for providing users of client devices with coordinated access to information andor functionality of multiple types, such as by using multiple types of connections to multiple information services of distinct types that exchange context information related to activities of the users andor clients. In preferred aspects, a sample is obtained at a first location and is diluted at the first location at a ratio of about 1:0 to 1:2, or greater, preferably at a ratio of about 1:0. A conducive wire runs the length of the body and permits signals andor power to be transmitted though the body as the tool changes its length. The summation device is preferably an operational amplifier. A plurality of grooves are formed on an inner surface of the protection plate to increase the protection plate’s resistance to bending, disperse the force of a load applied to the flat panel display, and decrease the possibility that the light-emitting device formed in the flat panel display will be damaged by the load.