The problems of human-computer communication (HCC) that arise with introduction of user groups with special requirements are discussed. We analyze new approaches that increase the quality of HCC in the environment of disabled users or user utilizing mobile devices. In both cases the problem of adaptation of the interactive system (which communicates with the user) to dynamically and very strongly changing context of use (end-device features, environment, user tasks, user capabilities, etc.) are addressed. We have analyzed existing solutions. The insufficiency of these solutions in the field of adaptation of system data (the data manipulated by the user using the user interface of an interactive system) was identified.