+An octave defines a fundamental [musical interval](/wiki/Musical_Interval), where a note's pitch repeats at double or half its original frequency. It is also the name of a powerful free software environment for [numerical computation](/wiki/Numerical_Computation), often used for data analysis and scientific programming.
+## See also
+- [Pitch](/wiki/Pitch)
+- [Frequency](/wiki/Frequency)
+- [MATLAB](/wiki/MATLAB)
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