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For other versions of our software packages please contact our support: opus-support(at)topcon.com

These products contain software components that are licensed by the holder of the rights as free software, or Open Source software, under GNU General Public License, Version 2 , or any later version, or GNU Lesser General Public License, Version 2.1, or any later version, or Open Source software, under GNU General Public License, Version 3, or any later version, or GNU Lesser General Public License, Version 3, or any later version, respectively.
The source code for these software components can be obtained from us by submitting a request to our customer service department:
opus-support(at)topcon.com