These small apps were based on web technologies: HTML, JavaScript, and CSS. Dashboard is a dedicated desktop that can run mini-apps called widgets.Spaces lets you create and manage virtual desktops, allowing you to organize activities to specific desktops, and then switch between them as needed.Exposé allows you to hide documents and app windows, or just as easily expose a window, app, or document you need to work on.Exposé, the oldest of the features, dates back to 2003, and the introduction of OS X Panther. Mission Control is actually a conglomeration of three earlier OS X Technologies: Dashboard, Exposé, and Spaces.
