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<p>Stub for Douglas McIlroy — Unix pipeline pioneer and quicksort co-inventor</p> <p><b>New page</b></p><div>&#039;&#039;&#039;Douglas McIlroy&#039;&#039;&#039; is a mathematician, engineer, and programmer best known as the creator of the Unix pipeline concept and the original developer of the Unix diff, spell, and macro processors. With [[Jon Bentley]], he developed the three-way partitioning scheme for [[Quicksort]] that made the algorithm robust against duplicate keys. McIlroy&#039;s intellectual style — combining formal rigor with practical systems engineering — exemplifies the Unix philosophy that small, composable tools are more powerful than monolithic applications. His work on [[Pipes and Filters|pipes and filters]] introduced a programming paradigm in which the output of one process becomes the input of another, enabling the construction of complex workflows from simple components.<br /> <br /> [[Category:Computer Science]]<br /> [[Category:People]]<br /> [[Category:Systems]]</div>

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