A dome portion of a contact piece has a plurality of circumferentially-spaced-apart marginal portions and a plurality of dome extensions provided between the marginal portions. in an aqueous environment; or is maintained at a temperature of from 5 to 70\xb0 C. A universal resource identifier is sent from the client computer to the server computer over the network, where the URI indicates a program, e. The system adaptively learns and captures the rules of the called party for handling calls, and learns which callers the called party always wishes to talk to.