usually used to refer to a simple message device, delivering either a single message or a few, compared with complex communication aid which can have very many messages stored.

A generic name for information centric mobile phones. In effect a fully featured personal digital assistant and mobile phone in one unit. The Nokia 9210 Communicator is an example of such a Symbian OS phone.

The element on an alarm control device – alarm panel, that automatically dials a central station and relays information about the protected building. It communicates digitally with the central station computer.

A device combining the characteristics of a PDA with those of a phone. Nokia makes the 9200 series Communicators, and Handspring's Treo device is also a Communicator.

Communicators are devices in the Star Trek fictional universe which are used for voice communication, either directly between two people with communicators, or via a ship's communication system.

Personality, purportedly of a deceased being, who communicates with living persons, often via a medium.

An MPI object that describes the communication context and an associated group of processes.

An otherwordly entity from which a medium or contactee receives messages.

Global object that groups application processes together. Processes in a communicator can communicate with each other or with processes in another group. Conceptually, communicators define a communication context and a static group of processes within that context.

A personality, usually manifesting through a medium, and claiming to be that of a deceased individual trying to communicate with the living. See also Drop-in Communicator.