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BTW, I didn’t check every detail, but a card reader reading “up to 200 cards/min” sounded way wrong, as I recall it. And it is way wrong! The IBM 3505 could read up to 1200 cards/min.

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Thanks! I thought 3 cards per second didn’t sound particularly fast, but I missed the punch card era. Not by a lot, mind you.

I can hear that 20Hz hum in my head right now!

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