The use of an index of words in Otto Muehl’s manuscripts is manifold. Initially conceived as an aid to deciphering them, the index has also proved useful in locating the “scores” of this or that Materialakion. It has also become possible to interrogate the manuscripts to find out whether Muehl had written anything about for exemple the “Modell” or the “Zuschauer”, or to locate among the texts the occurrence of a material, a gesture, or even a proper name. The index refers to the manuscripts fascicles published by the Association, indicating a number, a page and a line. Articles, pronouns and prepositions, which are of no interest, have been excluded from this work, which, moreover, can be improved. We invite everyone to report a gap, an inconsistency, a suggestion.