A list of things to be added, especially to the end of a book or document; the plural of addendum.
From Latin addenda, neuter plural of addendus (things to be added), from addere (to add). The word evolved from Roman administrative practices of noting supplementary information.
Addenda became especially important in the age of printing because books were bound before final corrections arrived—so publishers created these pages as a quick fix, making addenda a clever medieval solution to late-breaking information.
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