> public domain software may be free software but is not certain to be. Open Source relies on copyright and contract law (which are somewhat standardized or at

> public domain software may be free software but is not certain to be. Open Source relies on copyright and contract law (which are somewhat standardized or at least understood due to their importance in commerce). Public domain relies on other laws that can vary significantly. https://opensource.org/blog/public-domain-is-not-open-source https://opensource.org/blog/public-domain-is-not-open-source