
Let’s look at locks.
History From the beginning of humankind, people have felt the urge to protect what they possess. They start by covering their caves' entrance with stones; later, they hid their gold and jewels in the ground. Then they discovered locks. These were first made of wood and rope. They served the purpose well, although they were not so nicely designed. There is a lot of historical proof that certifies the use of locks long before we could imagine. Even in the Bible (Old Testament, Books of Judges), we frequently mention locks and keys. Types In modern society, we have keys and locks for everything: the house, the office, the car, the bike. We even have more than one key for the same building; keys and locks are so much a part…