the.com/carbon paper
the original copy-paste, ink-side down, no undo button.
means a thin sheet coated with ink or pigment used between two pages to transfer writing onto the sheet below as you write or type.
from invented in the early 1800s by italian inventor pellegrino turri, partly to help a blind countess write legible letters; it became an office staple once typewriters arrived, since the strike of a typebar was perfect for pressing ink through.
cc emailcarbon copy in email literally means this paper
peak eraoffices used billions of sheets by the 1950s
one shotmistakes transferred too, typos and all
killed byphotocopiers, then computers, made it obsolete
for instance
nasa apollo forms — mission logs duplicated by hand with carbon copies, 1960s-70s
nixon oval office memos — white house staff kept carbon copies for records, 1970s
receipt books — old taxi and store receipts used carbonless carbon-style duplicate pages