HP3000-L Archives

May 2014, Week 4

HP3000-L@RAVEN.UTC.EDU
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Subject:
Re: Tape to Punched Cards
From:
"Walter J. Murray" <[log in to unmask]>
Reply To:
Walter J. Murray
Date:
Thu, 22 May 2014 17:53:21 -0700
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Tony B. Shepherd asked:

> Speaking of odd trivia in the old days - anybody remember "column 81"
on a standard IBM card and what it was used for?

Do you mean the notch that indicated the card had gone through the IBM
056 verifier with no errors?

Walter

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