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Reference
PR: 7
| Includes physical constants, online unit conversions, periodic table of elements, exact time, fundamental physical formulae and equations. |
PR: 8
| Links to a variety of resources including news, weather, sports, encyclopedias, facts on file, FAQs, and tutorials. |
PR: 7
| Values recommended for international use by the Committee on Data for Science and Technology, International Council of Science. Navigation is by text search. |
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