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Of or relating to a hierarchical system that progresses from multiple small subunits to a single, large basic unit. quotations examples
The software is checked very carefully in a bottom-up fashion. First, each new line of code is checked, then sections of code or modules with special functions are verified.
1986 June 6, Richard Feynman, “Personal observations on the reliability of the Shuttle”, in Presidential Commission on the Space Shuttle Challenger Accident, Report to the President
Of or relating to a hierarchical system in which lower levels influence higher levels. examples