A billentyűzet is a device used to input text and commands into a computer or other electronic devices. It consists of a set of keys, each representing a letter, number, or function. Users press these keys to type and interact with software applications. Billentyűzetek come in various types, including mechanical, membrane, and ergonomic designs. They can be connected via USB or wireless technology. Some keyboards also feature additional keys for shortcuts and multimedia controls, enhancing user experience and productivity.