MacBook Air
The Mitsubishi Pedion, released in 1998, was the thinnest rectangular laptop at 0.72 inches (1.84 cm) until the release of the Dell Adamo in March 2009, which is a rectangular laptop 0.65 inches (1.65 cm) thick. Although both these laptops are thinner than MacBook Air's thickest point (0.76 inches/1.94 cm), MacBook Air tapers from 0.16–0.76 inches (0.4–1.94 cm), leading to some controversy over the "thinnest" laptop.