Long live the nub: ThinkPad designer David Hill spills secrets, designs that never made it

We almost got more butterfly keyboards and foldable workstations
Interview Launched in 1992, the boxy black ThinkPad with its little red nub remains the quintessential business productivity notebook. Unlike commercial offerings from competitors such as Dell and HP, Lenovo's laptop has a following of people who collect old models and celebrate each new innovation.…