Pseudo conversation is one technique. It is useful for CPU Opimization. when ever the program is not required relase the program. when ever the program is required reload the program. The main idea behind is suppose u send one map to application to terminal. the cpu waits for the input for the terminal. so cpu waiting. to avoid waste of the cpu time we release the program. When ever user given the input the program is again reload it.in this ideal time cpu take another program and process it.
(CICS) The program is not memory resident, which means, upon displaying the map, the program itself terminates and will only be restarted when the user enters the necessary data and/or presses PF or Aid Keys.