Systems and methods for performing schema matching of multiple data dictionaries. Upon receipt a hot-sync request from the PDA via the wireless link, the hot-sync server opens a network connection with the host system to establish a wireless hot-sync channel. An access communication system includes a local database system and an access server that is connected to the user system and the plurality of communication networks. The upper support is sized to hold a disposable plate and includes a clip to hold the plate in place.