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[–] 24187061? ago 

Out of curiosity, I spent about a half hour researching.

I know what you mean but I could find absolutely nothing.

Of course you have the original programming punch cards from the early days of computing. And they were called just that.

Punch cards.

The only place I have seen that personally is for grading an S.A.T type test where you fill in the little circles.

They would have a punched "answer sheet" that they would lay over top of your work for grading purposes.

Along the way I noticed that there are a lot of more efficient and simpler ways to create/decipher secret messages.

I'm thinking this is something you experienced personally but not something that was ever in practical use.

Sorry, not much help I know.

Peace!

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[–] 24187340? 0 points 1 point (+1|-0) ago 

The amateur radio Volunteer Examiners who administer tests to get your ham radio license use a similar kind of overlay but to my knowledge do not call the technique anything special. Sorry.

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[–] 24188013? [S] ago 

I have found something online and believe it to be code...putting together info and wanted to call it by name...sometimes people dog you for silly stuff instead of focusing on the truth of a thing. Thank you for looking into it. :)