スミソニアン博物館のインスタグラム(smithsonian) - 12月19日 06時21分

A city carrier brings boxes in the snow in this photo, circa 1950, from our @nationalpostalmuseum. ?? Before online shopping and two-day express shipping, letters and packages came on separate delivery vehicles.
After World War II, Americans started sending much more mail, especially as families began using mail-order catalogs to order household goods.
December has long been a busy month for the U.S. Postal Service, but the package volume has soared in the 21st century.

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