One of the algorithms in his third volume — on sorting and searching algorithms — inspired the first commercial implementation of an associatively indexed file system.
第三卷中的一个算法——关于排序和查找的算法——影响到第一个商业结合的索引文件系统的实施。
The retrieval of a data record in an indexed file by the primary (or optionally, alternate) key within the data record .