Tools can be ÒinterpretedÓ
+Looks same, functionally different:
+             
+                  vs.   


+e.g. Test vs. Survey
+a.k.a. eight different ways to use the same tool
+Looks different, functionally equivalent:
+             
              vs.


+e.g. Assignments section vs. syllabus (to deliver assignments)
+a.k.a eight ways to do the same thing