User Guide

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To view the name of the default system of units, use the Units[UsingSystem]
command.
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To change the system of units, use the Units[UseSystem] command.
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Extensibility
You can extend the set of:
• Base dimensions and units
• Complex dimensions
• Complex units
• Systems of units
For more information, refer to the ?Units[AddBaseUnit], ?Units[AddDi-
mension], ?Units[AddUnit], and ?Units[AddSystem] help pages.
For more information about units, refer to the ?Units help page.
104 • 3 Performing Computations