According to an email communication from Achleitner, "The "o-i-studie" is a minimalized script of a film in which the sign 0 is transformed into either the number "0" (zero) or the letter "o" depending on the surrounding signs or visual materials. The 0 may even remain a neutral ornamental sign. In the course of my "o-i-Studie" it is shown how the neutral sign is transformed into the letter 0." -- Source of annotation: Marvin or Ruth Sackner.