Translation guide
The software that manages computer hardware and provides common services for programs. In Japanese, the English abbreviation 'OS' is overwhelmingly common.
The core system software of a computer or device.
The standard term, pronounced オーエス. Used in all contexts, from casual to technical.
このパソコンのOSは何ですか？
What operating system does this PC have?
OSをアップデートしたら速くなった。
After updating the OS, it became faster.
Literally 'basic software'. Sometimes used in educational contexts or by older speakers, but OS is preferred.
Even in formal business settings, 'OS' (オーエス) is the natural choice. The full term オペレーティングシステム sounds overly technical or textbook-like.
The full loanword. Used in formal or technical writing, but less common in speech.
オペレーティングシステムの基本概念を学ぶ。
Learn the basic concepts of an operating system.
基本ソフトの役割を説明してください。
Please explain the role of the operating system.