Ranganathan’s Five Laws of Library Science

S. R. Ranganathan’s five laws of librarianship are:

  1. Books are for use.
  2. Every reader his book.
  3. Every book its reader.
  4. Save the time of the reader.
  5. The library is a growing organism.

My favorite laws are 2 and 3: Every reader his/her book AND Every book his/her reader!