The PowerBook Duo is a line of subnotebooks manufactured and sold by Apple Computer from 1992 until 1997 as a more compact companion to the PowerBook line. Improving upon the PowerBook 100’s portability (its immediate predecessor and Apple’s third-smallest laptop), the Duo came in seven different models. They were the Duo 210, 230, 250, 270c, 280, 280c, and 2300c. The PowerBook Duo line was replaced by the PowerBook 2400.

Weighing 4.1 pounds (1.9 kg) and slightly smaller than a sheet of paper at 10.9 in × 8.5 in (280 mm × 220 mm), and only 1.4 in (36 mm) thick, it was the lightest and smallest of all of Apple’s PowerBooks at the time, and remains one of Apple’s smallest notebooks ever produced. Only the MacBook Air, the 13-inch (330 mm) Retina MacBook Pro and the 12-inch (300 mm) Retina MacBook weigh less, though they are wider and deeper (but considerably thinner). The Duo had the most in common with the original MacBook Air which only included one USB 2.0 port, one video port (requiring an adapter) and one speaker port, but no ability for expansion.

Apple museum (Moscow, Russia)

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