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Libraries sometimes colour-code their books so that they are easier to identify and find by library users.
no, because you might ruin the books
It is very important to organize library contents because libraries are meant to be able to be used to look things up. If things are not in order than people will just tear through everything to find something.
Books helped knowledge to spread throughout China during its golden ages. Importing of goods from European countries and industrialization spread knowledge throughout China
There were no public libraries, although those who were very rich may have had private libraries - this was a vast room with a collection of books and usually somewhere quiet to study or read them.
gun powder and magnetic compasses
no
because libraries are places built for people to borrow or read books
Yes, as most books are out of print at any given time. Larger public libraries and all academic and scientific libraries have many older books. The same applies to specialist libraries.
They both have books
Libraries is the plural form of library.
We have libraries so that people can read books and extend their knowledge.
The plural of library is libraries. As in "libraries have lots of books".
Arabs did not invent books. Books existed long before the Arabs began to use them.
Books helped spred knowledge during china's golden age.
At book stores or libraries.
Books.