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We know they have at least one printer on the ISS – that's NASA-supplied so it would be in the US Orbital Segment. Presumably there is a printer in the Russian Orbital Segment as well. (Mir had a teletype.)

My question is – what paper size do they use on the ISS – A4, US Letter, or a mix? I assume that if Roscosmos has a printer they'd want to load it with A4; but would NASA use A4 in their printer so the whole of ISS uses a standard paper size? Or would they stick to US Letter since that's what NASA is used to?

(Also, I guess there is some argument that something called the "International Space Station" ought to prefer the international standard paper size.)

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  • $\begingroup$ different but related: Was this printer shown the ISS in 2015 built specially to work in microgravity? $\endgroup$
    – uhoh
    Mar 25 at 13:24
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    $\begingroup$ I like this question, but I can't help but wonder - what motivated you to ask it? $\endgroup$
    – SF.
    Mar 25 at 14:29
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    $\begingroup$ They use it to print out procedures, which on the ground are US letter, but I can't find anything to confirm that's what is used up there. Cool question! $\endgroup$ Mar 25 at 19:20
  • $\begingroup$ @SF Curiosity mainly. Also, I am interested in standards, and wonder if US dominance in space is going to lead to the US tendency to not use certain international standards to be exported to space and other celestial bodies. NASA and the commercial space industry presently prefer metric for anything in space (although I believe the US segment of ISS is metric for new stuff but still uses US customary for some older components), so that's one area in which it probably won't happen. But paper sizes is another. $\endgroup$ Mar 26 at 8:14
  • $\begingroup$ IMO, a useful answer will primarily address the physical paper sizes available on the ISS, as virtually all "modern" printers can handle a plethora of formats... $\endgroup$
    – Digger
    Apr 25 at 14:33

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