1161. Today, we look at the history of writing in all-uppercase letters. Tech historian Glenn Fleishman explains how capitals transitioned from a sign of importance to a convention for shouting. Plus, we discuss his research tracking the association between yelling and capital letters back to 1856 and why early newspapers used all capitals to make tiny type seem larger.

Glenn Fleishman's website.

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WHY WE USE ALL CAPS TO SHOUT, with Glenn Fleishman

Grammar Girl: For Writers and Language Lovers.

WHY WE USE ALL CAPS TO SHOUT, with Glenn Fleishman