cookie: n. A handle, transaction ID, or other token of
agreement between cooperating programs. "I give him a packet, he
gives me back a cookie." The claim check you get from a
dry-cleaning shop is a perfect mundane example of a cookie; the only
thing it's useful for is to relate a later transaction to this one
(so you get the same clothes back). Compare magic cookie; see
also fortune cookie. Now mainstream in the specific sense of
web-browser cookies.
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