ソフトウェアのソースコードを公開し、誰でも使用・改変・配布できるようにするモデルです。デベロッパーコミュニティ主導での継続的な開発や更新が促進されやすい点が特徴です。
Open Source
This is a model in which the source code of software is made public so that anyone can use, modify, and distribute it. It is characterized by the fact that it facilitates continuous development and updates led by the developer community.