1. 
   case sensitivity
   (text) Whether a text matching operation distinguishes upper-case (capital) letters from lower case (is 'case sensitive') or not ('case insensitive'). Case in file names should be preserved (for readability) but ignored when matching (so the user doesn't have to get it right). MS-DOS does not prese...
   Found op http://foldoc.org/case+sensitivity
   
   
2. 
   Case sensitivity
   Text sometimes exhibits case sensitivity; that is, words can differ in meaning based on differing use of uppercase and lowercase letters. Words with capital letters do not always have the same meaning when written with lowercase letters. For example, Bill is the first name of former U.S. president ...
   Found op http://en.wikipedia.org/wiki/Case_sensitivity
   
   

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