also: プロプライエタリー · プロプラエタリ · プロプリエタリ
na-adjective, noun
proprietary
Computing term for software, technology, or systems that are privately owned and controlled, as opposed to open-source or standard.
このソフトウェアはプロプライエタリなので、ソースコードは公開されていません。
This software is proprietary, so the source code is not publicly available.
Relying on proprietary technology can make changes difficult later.