Metal Library Systems are the most robust library systems, used in our schools and in our homes. The bookcases have an important place both at home, at school and in the large libraries. No matter how much the technology is advanced, the virtual books will never replace the carefully prepared and printed books. The books contain a lot of memories. Certainly there are book which we read and which give us pleasure and touch us. We want to keep these books without being burnt or torn, so we need bookcases. Or the books that offer us information, our textbooks, encyclopedias. Each of them has a special place. And then they are stored to serve another person.