Disclosed is a flexible, multi-modal system useful in communications among users, capable of synchronizing real world and augmented reality, wherein the system is deployed in centralized and distributed computational platforms. The system comprises input devices to generate signals representing speech, gestures, pointing direction, and location of a user, and transmit the same to a multi-modal interface. A plurality of agents and one or more databases are integrated into the system, where at least some of the agents receive signals from the multi-modal interface, translate the signals into data, compare the same to a database, generate signals representing meanings as defined by the database, and transmit the signals to the multi-modal interface. Finally, a plurality of output devices are associated with the system to receive and process signals from the multi-modal interface, some of said signals representing messages to the user to be communicated by means of an output device.