MATLAB relation with octave

Dear All,
Good afternoon
Some where I read MATLAB is an fork of Octave, is it true
is there any link for me to read and understand more about it

Octave is not a fork of Matlab.
Matlab’s code is closed source and covered by TheMathworks’ copyright.

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if you’re referring to the historical development of matlab and octave into what they are today, they did not originate from a common source.

For the origin of Octave, see:

For the original university origins of matlab, wikipedia provides a nicely referenced summary:

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