The IBM Personal Computer Keyboard is the most common and widely considered to be the definitive Model F keyboard. Debuting with the IBM 5150 Personal Computer in August 1981 and later featured with the IBM 5160 Personal Computer XT (whose name was adopted as the common nickname for this keyboard, F/XT), this keyboard played an important role in establishing the PC as a high-quality computer and solidifying buckling spring-based keyboards as IBM's go-to for well over a decade after its release. Relative to the competition, the Model F/XT brought unsurpassed reliability and build quality to the mix but arguably suffered from a layout too different from others.