Abstract: The present invention provides an interface between the user and a computer system. Specifically, the user may predefine various tasks, indicia of which are displayed on a display screen associated with the computer system. A respective task may be effected by designating the indicia of the task on the display screen with an indicator (such as a cursor) and depressing a single button. The position of the indicator on the display screen may be specified by the moving of a mouse pointing device. A user may predefine the various tasks by generating a source code data file, which is compiled to produce a structured database stored in a random access memory. Tasks to be performed may include changing the function associated with actuating the mouse pointing device. Associated with the structured database are a number of nominal blocks including blocks defining groups of indicia to be displayed on the display simultaneously, and tasks associated with each of the indicia to be effected.