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Short article reproducing a floating-point precision benchmark from Fred Gruenberger in Scientific American (April 1984): enter 1.0000001 and square it 27 times. Sinclair BASIC produces only a 3.33% error while the Apple IIe produces 96.60% error and the IBM PC 1212.06% error. Suggests Timex/Sinclair owners keep their computer as a high-precision arithmetic tool even after upgrading.