(1) A laptop keyboard from IBM that was known for its ergonomics. See TrackWrite. See also Butterfly computer. (2) An ultra-thin keyboard from Apple for its MacBook laptops starting in 2015.

It’s the IBM 701c, the famous “Butterfly” laptop, whose fold-out keyboard still gives it star quality, and [John Graham-Cumming] has documented the restoration of one from the tattered ...

The third generation of the butterfly keyboard on Apple's Mac laptops was supposed to fix all the problems. But nope. WSJ's Joanna Stern explains why the keyboards on the newest and most expensive ...

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On a typical keyboard, keys are attached using two pieces of plastic that cross each other and close like a pair of scissors when pressed. The butterfly-keyboard keys instead used a wing-like hinge.

Apple's more powerful laptop weighs 3.02 pounds and measures ... key cap and rubber dome compared to the older Butterfly mechanism. The new keyboard design also brings another improvement besides ...