2.how many columns were on a punch car in 1929, and how many punch locations were there?

How it was: Paper tapes and punched cards

Douglas W. Jones’s punched card index

How it was: Paper tapes and punched cards

Keypunch
Douglas W. Jones’s punched card index

Douglas W. Jones’s punched card index

How it was: Paper tapes and punched cards

How it was: Paper tapes and punched cards

Keypunch

Douglas W. Jones’s punched card index

Keypunch wiki | TheReaderWiki

Douglas W. Jones’s punched card index

Keypunch

Keypunch

Tabulating machine

Douglas W. Jones’s punched card index

The American Rolls Royces — car collection packs a punch | News …

History of the punch card

Douglas W. Jones’s punched card index

Ralph Lauren on timeless car

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Ralph Lauren on timeless car

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Ralph Lauren on timeless car

Ralph Lauren on timeless car

Tabulating Machines

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