a dual process display server comprising a first memory ; a second memory ; a first process for receiving requests from a client program , dispatching client requests falling within a first prescribed category of requests , storing in the first memory requests falling within a second prescribed category of requests and storing in the second memory messages associated with requests stored in the first memory ; and a second process for retrieving messages from the second memory , retrieving client requests from the first memory , and dispatching requests retrieved from the first memory in accordance with messages retrieved from the second memory .