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this is soooo me. i swear my grandson hides when i call to ask a question, lol


1654460169095.png
 
You just needed to know where to kick it.

Ben
...And I think their math is wrong too. :confused:
Each card had 80 columns with 9 bits of data in each column (an 8-bit byte with one checksum bit).
Each card had 80 bytes of data on it, see below:
9e0df994a401c1a31ccb5960e1b44791--punched-card-file-format.jpg

5mb would only be 62,500 cards. There's a lot more than that in the pic.:rolleyes:
 
The problem was Navy supply clerks would staple or paperclip cards together and the data entry clerks would not look for that. They would just take as many as they could hold and put them on the feeder and when it jammed they called us. We had to remove the jammed card then find the last card that was processed then manually duplicate the card and start the feeding from that point.
IBM cards were obsolete by 1980 but the Navy continued to use them.
 
...And I think their math is wrong too. :confused:
Each card had 80 columns with 9 bits of data in each column (an 8-bit byte with one checksum bit).
Each card had 80 bytes of data on it, see below:
9e0df994a401c1a31ccb5960e1b44791--punched-card-file-format.jpg

5mb would only be 62,500 cards. There's a lot more than that in the pic.:rolleyes:

I never saw the cards with the results of the questionnaires, I just gave the data center my "header cards" so I got the results.

decades later, I wish I would have kept em. :(
 

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