Apple's optional iPhone/iPad-like interface for the Mac. Introduced with Lion Version 10.7 in 2011, it provides an icon grid for launching Mac applications similar to Apple's mobile devices. Icons can be moved between multiple screens, and folders can be created by dragging one icon on top of another. See Lion
Like the iPhone/iPad
New Mac Keyboard Keys
Offering an optional iPhone/iPad-like interface, Launchpad is also reminiscent of the Windows 3.0 desktop more than 20 years earlier. See Program Manager
After its introduction, Launchpad became a dedicated key on subsequent Macs.