Demonstration of the unique sound of the 84-key IBM Model F keyboard that came with the Personal Computer AT computer in 1984. This model is somewhat rare because only one year later, IBM introduced the 101-key "extended" Model M keyboard across its PC lineup, which most AT buyers opted for instead of the 84-key keyboard. But unlike the Model M's membrane switches, it uses capacitive switches under the buckling springs, giving a lighter typing feel and a more metallic sound.
