Surface Mini is a unreleased tablet computer that Microsoft designed as the planned successor to the Surface 2 in the Microsoft Surface family. The device has a Qualcomm Snapdragon 800 processor and a 7.5-inch (19 cm) 4:3 aspect ratio touchscreen display that defaults to portrait mode. Like its predecessor, the Surface Mini runs Windows RT 8.1, a mobile operating system that was designed for the ARM architecture and has limitations including an inability to install Win32 applications; programs can only be installed from the Windows Store.