To perform an arithmetic operation, this act so evident for us, that consist in writing some numbers and manipulating writing to obtain a result was for the vast majority of the people of that time out of their imagination. The revolution was in using not anymore tokens but written words - It was possible to make computation using the same written name of the numbers! With the new representational media, the way in which the numbers were represented embodied the privileged manipulation of the content; which until that time was entrusted to another artefact. Words become operational in new ways tanks to the properties of the new artifact. This is the real power of any media and as far as I can the research projects I try to carry out aim to innovate media so to properly embody the concept of situated production and editing to support the human creative process in everyday activity.