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What's new in this version (12.2):
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Boost Your grades with this illustrated quick-study guide. You will use it from high school to college and beyond.
Conversion of over 1,000 units.
Metric, English, and US customary systems.
List of powers of 10 prefixes.
Explanation of SI writing style.
Approximate conversion of units.
Clear and concise explanations.
Last comments from Android Market
This is good reference.
Not easy to use