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submitted 8 months ago by [email protected] to c/[email protected]

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[–] [email protected] 2 points 8 months ago (1 children)

Oh boy, forgot about those. Every school library used one to read a barcode.

[–] [email protected] 4 points 8 months ago (1 children)

You're probably thinking of something else. You can't read anything with those

[–] [email protected] 3 points 8 months ago

They're thinking of optical pens