Not quite. In the US at least, works by the federal government are not covered under copyright. Nor are 'mere facts' (eg, a complete list of phone numbers and n

Not quite. In the US at least, works by the federal government are not covered under copyright. Nor are 'mere facts' (eg, a complete list of phone numbers and names for a region). See https://en.wikipedia.org/wiki/Copyright_law_of_the_United_States#Works_subject_to_copyright_law https://en.wikipedia.org/wiki/Copyright_law_of_the_United_St... . bee_rider already referred to https://en.wikipedia.org/wiki/Numerical_Recipes#License https://en.wikipedia.org/wiki/Numerical_Recipes#License so I leave it at that.