IBM is thinking about bringing back the Butterfly keyboard, which appeared on some of its ThinkPad laptops in the mid-Nineties. The Butterfly keyboard could expand to be wider than the rest of the laptop, making it possible to pack a bigger keyboard into a smaller computer. Anyway, IBM has been showing off a couple of prototypes with keyboards inspired by the original Butterfly design, but won’t say whether or not they’ll ever be put into production.