Abstract: Described is an information system consisting of a server computer and one or more client computers connected with the server by a communication channel, wherein a data modification and retrieval operation being executed by the server computer, and the client computers executing the requests to the server for the data modification and retrieval and representing the advanced graphical user interface, characterized in using, at each client computer, an extendable universal system of dynamically created self-sufficient objects. Also a method is proposed for providing an advanced, dynamically created graphical user interface at a client computer in a client-server information system, characterized in using a developed system of self-sufficient objects operated according to a certain algorithm, i.e., a program object system functioning without using event handlers.