A technology used by companies to filter queries and demands for service using the telephone system. The user who phones in to the company is presented with a number of spoken options. The user responds either by pressing a key on the telephone or by speaking a simple word such as ‘yes’ or ‘no. ’ Such systems are usually connected into a network containing large databases. A typical use for this type of system is for dealing with simple banking enquiries or providing a help facility for a computer manufacturer.