Cut-out (recording industry) - Wikipedia

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Phonograph record - Wikipedia

Phonograph record - Wikipedia

This wierd notch in this CD : r/whatisthisthing

How do the words in books fit perfectly in the margins? Every line ends at the exact same point. How do they make that point the end of a word or a

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A New World Record - Wikipedia

Why do some print newspapers have holes cut out of the bottom corner of every page except for the title and first couple paragraphs? - Quora

Music Weird: The controversy over cut-out records in the 1960s