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(1) Ethan Mollick on X: "Before PowerPoint, DuPont had a Chart Room. Made in 1919, it was considered so vital that its existence was secret for 40 years Charts would zoom towards the board on monorails. The original version was a set of fixed slides that executives in wheelie chairs would be pushed past https://t.co/BheaisMd2R" / X (twitter.com/emollick)
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