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I search how can I download spin program that is one of bioinformatic staden package.
Spin is part of the main Staden package. Just download the appropriate staden-* file from the files section.
Note though that Spin doesn't have a maintainer. I work on Gap4 primarily (and to a limited degree Trev and Pregap4 to keep it ticking over). As such it's not progressing, but I think despite this there are still some features which are unique to Spin.