added reading_writing.md

Tasks_of_the_Contingent_Librarian/reading_writing.md

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+# reading/writing
+
+## reading
+
+On the surface of it, a library is a place for reading.
+
+Unix-like systems use three permissions; 
+
+1. *executable*
+2. *read*
+3. *write*
+
+## writing
+
+Writing is a technology, one which structures thought in a linear manner (*see* Flusser). Writing doesn't only involve alphanumeric characters. 
+
+machine reading
+machine writing
+
+human reading
+human writing
+
+permissions