Since the release of Mac OS X 10.0 in 2001, the Dock has been one of the most prominent features of operating system's user interface, serving as a centralized launch pad for applications and document files. Now, nearly a decade after filing for a patent on the OS X Dock, it has pple now has the exclusive right to prevent others from making, using, selling, or otherwise employing replicas of the technology in their own products for 20 years from now – which could spell trouble for imitators such as ObjectDock, RocketDock, and others. The patent puts a particular focus on the Dock's ability to magnify icons to a predetermined size when the cursor is near, the user's ability to rearrange icons, and how it indicates which applications are running.