The object permanency principle in the usability discipline

The usability discipline is the new and growing area both of the information sciences and ICT technologies, namely for the interactive use of the professional e-services, for the e-government. The Object Permanency Principle - the OPP - is one of the most fundamental principles of the human (may be not only of the human) perception, having evolved in our early childhood, about 6 month age. The usability discipline has not yet realized its importance. Using the e-services we have to recognize without effort and waste of our time what we see on the screen: the structure of the portal, the content table, the data panels, the forms, the dialogue states. Does the machine wait for me, or I have to wait for it? Is this form the same, that I have already filled, or the new one? Our research suggests that the OPP compliancy would be one of the fundamental paradigms of the usability. This paper analyzes some situations, peculiar to e-services, showing the wrong and the suggested solutions.