A server version of the new operating system was released as Mac OS X Server 1.0 in 1999, and the first consumer version, Mac OS X 10.0, in 2001. The OpenStep developer toolkit was renamed Cocoa. Rhapsody's Blue Box was renamed Classic Environment and changed to run applications full-screen without requiring a separate window. Apple included an updated version of the original Macintosh toolbox, called Carbon, that gave existing Mac applications access to the environment without the constraints of Blue Box. Some of NeXTSTEP's interface features are used in Mac OS X, including the Dock, the Services menu, the Finder's "Column" view, and the Cocoa text system.