Practitioners in the lock trade are called locksmiths. Although fitting of keys to replace lost keys to automobiles and homes and the changing of keys for homes and businesses to maintain security are still an important part of locksmithing, locksmiths today are primarily involved in the recommendation and installation of higher quality locksets and the design, implementation and management of keying and key control systems. Most locksmiths are also involved in electronic lock servicing, such as making keys for transponder-equipped vehicles and the implementation and application of access control systems protecting individuals and assets for many large institutions.