To add or attach something as a supplement or continuation to something else, typically at the end.
From Latin 'appendere' meaning 'to hang upon,' composed of 'ad-' (to) and 'pendere' (to hang). The word entered English in the 15th century, originally meaning to hang something from something else, then developing the sense of adding supplementary material.
In computer programming, 'append' is a fundamental operation that adds data to the end of a file or list, making it one of the most frequently used terms in coding. The physical metaphor of 'hanging onto' something still makes sense in digital contexts - we're essentially hanging new data onto existing data structures.
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