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Comment by MBCook | Hacker News Reader

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IrDA. I remember having it on laptops, palmtops, printers and such but I don’t think I ever actually used it.

https://en.wikipedia.org/wiki/Infrared_Data_Association

Early smartphones had it too, which was nice as then you could use them as universal remotes in a pinch.

You could walk up to a random HP printer and print from your palm pilot. Handy while traveling.

The original iMac had it, but it was dropped in the first refresh

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