1989NeXTSTEP was an innovative operating system developed by NeXT Computer, a company founded by Steve Jobs after he left Apple. It was based on the Mach kernel and included several advanced features, such as object-oriented programming, a graphical user interface, and support for networking and multimedia. NeXTSTEP was originally designed for NeXT's own line of workstations, but it also gained popularity among developers who appreciated its powerful development tools and support for multiple programming languages. While NeXT Computer did not achieve widespread commercial success, NeXTSTEP proved influential in the development of other operating systems, particularly Mac OS X, which was based on NeXTSTEP's successor, OPENSTEP.