Fuel cell devices and systems are provided. The keyboard incorporates the multi-function keys, such as a scroll-control-ball which can move the screen from various directions, an up-down-left-right keys to control the position of the cursor, editing functions keys which provide such functions as cut, copy, paste, mark, recovery, scroll page, insert and delete to enable speedy editing. The coupling members are furthermore capable of extending parallel to the first and second plane of the receiving devices and thereby reduce the extent to which the coupling members bulge out. If the intermediate network device receives a proposal bridge protocol data unit message on the third port, rather than transition the one or more second ports to a blocking state, the intermediate device is adapted to maintain the one or more second ports in the forwarding state. The clamping apparatus further includes a second actuator coupled to a second flow control member.