I believe I have read the Bruce & Levin Taxonomy thoroughly, besides, I also read what is written by other students. I can not mention anything that would not fit in this taxonomy. First of all the taxonomy is very broad in its basic categories that are taken from Dewey. Inquiry, communication, construction, and expression are very wide categories. In addition to that Bruce and Levin created a lot of sub-categories that fell under these four major categories. Honestly, I did not even understand the meaning of many of these sub-categories, let alone to figure out whether some applications can fit in them or not. I am totally new to this field. Challenging this taxonomy entails being in a way on equal footing with the people who created it. One needs to be knowledgeable about the field, and familiar with all these sub-categories in order to figure out what can fit and what can not. On the other hand, what is suggested by the students as falling out of the realm of this taxonomy is not quite outside this taxonomy as far as I can guess. On the contrary I found a lot of what they mentioned falling within the limits of this very broad taxonomy "if it really has limits. I am not building this judgment on concrete knowledge of course. Rather, I am only employing my common sense and guesses.