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註釋"PHD [Program for Handling Data] is a program for storage, display, testing and manipulation of small numeric data collections (2 to 500 observations). The implementation is on a VAX 11/780 in BASIC. Modules allow entry, correction, storage, retrieval, sorting, least squares fitting and plotting. One may also add user written modules to manipulate sets of data. The graphics module given requires a Tektronix 4014 or compatible terminal. A program listing is included."--Abstract, report documentation page.