Instant messaging clients transmit, to a server, presence information indicating that the respective client is in a communicative state in which the client is receptive to communicating with the other clients. The controller receives registration requests from the devices and selectively registers the devices based on various factors. A tongue and groove attachment means attaches and interlocks the vertically stackable candy delivery bins to form a stacked configuration wherein the bins are stacked one over another in an interlocked array. Subsequently, the search engine will generate search results based on the obscured information request.