High fidelity systems can also be referred to as hi-fi, high-end audio systems, or home audio systems. The term hi-fi has been used since the 1950s to denote the reproduction of sound with a high level of fidelity, or accuracy. The term high-end audio is often used to describe systems that are more expensive and include advanced features such as surround sound, wireless capabilities, and audiophile-grade components. Another term, home audio systems, refers to systems designed for use in the home rather than for professional or commercial use. Regardless of the term used, high fidelity systems are revered for their ability to reproduce sound with remarkable accuracy and clarity.