Computer software for use by communications service providers to access, create, collect, store, remove, transfer, disseminate, organize or otherwise utilize voice, text, graphics or other data over a global computer network and other networks, and for use by communications device manufacturers to enable their devices to access, create, collect, store, remove, transfer, disseminate, organize or otherwise utilize such data over a global computer network and other networks, and documentation sold together as a unit; computer operating system, namely, a client/server platform consisting of hardware and software for linking wireless applications with enterprise networks and the Internet; computer software for use in facilitating communications over computer networks, namely, electronic messaging software; server software for Internet access which may be used with hand-held devices such a pagers and cellular phones; directory software, domain name and other network address software and software that enables external implementation and management of the functionality that this software provides; computer software, namely, a message transport agent for directing electronic mail across the Internet based on open standards and incorporating high security and ease of use; computer software for use in wireless provisioning and hand-held device management; computer software for synchronizing contact, calendar, task list and other information between a personal computer and a hand-held device; computer software for determining location, presence or availability of a hand-held device