a silk-screen print calculated with a IBM computer using a plotter to create the different screens.(fortran, 1974.)

Of 1970 to 1974 we had no display screen for visualization. It was necessary to find a way for seeing the calculated image. We used all that we were able to find, since the printer's paper painted by hand, followed by punch cards when it was possible until a plotter to produce silkscreens.

During the following years (75-80) we began to explore a first display screen built in our university.