1. In a system for producing plural word synthetic messages from a compilation of a large number of predetermined plural word messages stored in a memory in response to acutation of a relatively small number of selected keys on a keyboard in a selected sequence, said actuation of said keys selectively retrieving desired messages from said memory, the improvement comprising: a plurality of keys in said keyboard, each bearing polysemic pictorial illustrations related to the message to be retrieved from said memory; classification means for designating one of said keys as a primary message theme key in response to successive actuations of said keys, the other keys acting as modifying keys following said successive actuations of said keys; said modifying keys being selectively actuated in combination with said primary message theme keys in selected sequences to selectively retrieve one of said plural word messages having a theme associated with the polysemic pictorial illustrations on said theme keys.