Even with the emergence of higher-level computer languages, C retains its significance and use. There are endless examples where C is used today and continues to empower applications. Some of the most famous and popular software systems programmed using C are Microsoft Windows, Linux, Mac and several mobile operating systems like iOS and Android. Databases like Oracle and Microsoft SQL Server are also built using C. C is also used in embedded systems in cars for creating sophisticated displays, climate control, keyless entry and other high-end features.