http://www.macnn.com/articles/02/08/23/metricmaster.3.0:/
MetricMaster 3.0: unit conversion calculator
updated 09:25 am EDT, Fri August 23, 2002
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Eric Rojo's MetricMaster 3.0 is a measurement unit conversions calculator containing over 2,000 metric/S.I., imperial, U.S., and other units in its database (with up to 14 significant digit precision). It supports ft/in/fractions, scientific notation and control of significant digits and can also convert currencies, clock times, and many physical constants. Version 3.0, with a new Aqua-style interface, now contains 600 definitions for units and unit groups and also contains extensive information on the history and development of modern measurement systems. The $15 shareware support Classic only.
