Aunt Fifi's House. On the left, the image as it is drawn; on the right, its interpretation by the computer. The program records the drawing over time, based on the speed at which it is produced, and can redraw lines that have been drawn in real time. In practice, it is supposed to extract the primary elements of a drawing - line segments, arcs, and points - and then assemble them into objects. The experience with the sketch of Aunt Fifi's house reveals that he often fails to do this accurately. The tablet transforms the elements of the drawing into data, and it is not always clear which data are the most important. The computer is already systematically limiting itself to what the drawing can be and mean.