Upgrading from IBM Model 026 keypunches (which didn't print characters at the top of the card) to Model 029 (which did). No more reading cards by guess and by golly if you dropped them and there wasn't a sorter available (you did punch sequence numbers in each card, didn't you? You certainly did after you dropped a few boxes...)
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Upgrading from IBM Model 026 keypunches (which didn't print characters at the top of the card) to Model 029 (which did). No more reading cards by guess and by golly if you dropped them and there wasn't a sorter available (you did punch sequence numbers in each card, didn't you? You certainly did after you dropped a few boxes...)