Dock may refer to any of the following:
1. The Dock is a bar located at the bottom of the macOS screen on Apple computers. It that allows quick access to programs you frequently use as well as programs and files that are currently in use. The picture below shows the Dock in macOS X.
Tip: Users more familiar with Microsoft Windows computers can think of the Dock as the Taskbar.
2. The term dock also refers to the process of connecting your computer to a docking station.