In one embodiment of the present invention a laterally folding knife is described incorporating an actuator mechanism permitting the knife blade to be moved from open and closed positions without the need for a user to touch the blade. A party may invite other party to split the conference into two conferences. The first and second fasteners are accessible at the inside of the bag, the first fastener is relatively distant to the ring, and the second fastener is relatively near the ring. The targeted advertisement is generated. And, the shaped body has at least one of a projection, a depressed portion and a hollow structure defining a hollow space therein. Positional information of the users in the hotel or in the various hotel facilities can be obtained by the present invention.