Abstract: A system for choosing data to be displayed on a first device. The system includes a first database comprising an autocomplete dictionary which is the default autocomplete database for the device, used by several applications on the device. The system also includes a second database listing data to be displayed on the device and selecting means for selecting from the said second database data to be displayed at any given time. The first database includes a vocabulary of words commonly used by the user of the device and ranked or weighted by their frequency of use and that the said selecting means is configured to access the said words in the first database together with their rank or weighting and select from the second database data to be displayed based partly or wholly on the said words and their rank or weighting.