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Baltimore, Md. A coding system, which eliminates all vowels and some consonants and reduces the remaining letters of the alphabet to groups designated by six master, or key, letters is employed in the Social Security Board Records Office. The [...]ing system was adopted as a "foolproof" methods of k
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Baltimore, Md. A coding system, which eliminates all vowels and some consonants and reduces the remaining letters of the alphabet to groups designated by six master, or key, letters is employed in the Social Security Board Records Office. The [...]ing system was adopted as a "foolproof" methods of k

Harris & Ewing · 1937-01-01 · photo, print, drawing

From the collection of Library of Congress. Free to download, adapt and use — no permission needed.

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glass negativesbaltimoreunited statesmaryland
Credit lineBaltimore, Md. A coding system, which eliminates all vowels and some consonants and reduces the remaining letters of the alphabet to groups designated by six master, or key, letters is employed in the. 1937-01-01. Harris & Ewing. Harris & Ewing Collection, Library of Congress. Public domain.
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