| Subject | English | Japanese |
| comp. | n disk operating system | ディスク・オペレーティング・システム |
| comp. | n disk operating system | ディスクオペレーティングシステム |
| comp., MS | guest operating system | ゲスト オペレーティング システム (The operating system running on a virtual machine) |
| comp. | n guest Operating System | ゲストＯＳ |
| comp., MS | guest operating system profile | ゲスト オペレーティング システム プロファイル (A library resource containing the most common settings from a Sysprep.inf file, including the computer name and domain or workgroup settings, which can be applied to a virtual machine template) |
| comp., MS | host operating system | ホスト オペレーティング システム (The operating system of the physical computer running the Virtual Server or Virtual PC software) |
| comp. | n host Operating System | ホストＯＳ |
| comp., MS | Microsoft Disk Operating System | Microsoft ディスク オペレーティング システム (A Microsoft computer operating system with a command-line interface that is used to control many internal computer functions, such as running programs and organizing and maintaining files) |
| comp., MS | Microsoft Windows operating system | Microsoft Windows オペレーティング システム (A proprietary software operating system with a graphical user interface (GUI)) |
| comp., MS | MS-DOS operating system | MS-DOS オペレーティング システム (A Microsoft computer operating system with a command-line interface that is used to control many internal computer functions, such as running programs and organizing and maintaining files) |
| comp. | n multitasking operating system | マルチタスク・オペレーティング・システム |
| comp. | n multitasking operating system | マルチタスクオペレーティングシステム |
| comp. | n network operating system | ネットワークオペレーティングシステム |
| comp. | n network operating system | ネットワーク・オペレーティング・システム |
| comp. | n network operating system | ネットワークＯＳ |
| comp. | n operating system | 基本ソフト |
| telecom. | operating system | オペレーティングシステム |
| comp. | n operating system | オペレーションシステム |
| comp., MS | operating system | オペレーティング システム (The software that controls the allocation and usage of hardware resources such as memory, central processing unit (CPU) time, disk space, and peripheral devices. The operating system is the foundation on which programs are built) |
| comp. | n operating system | オペレーション・システム |
| comp. | n operating system | ＯＳ |
| comp., MS | operating system deployment | オペレーティング システムの展開 (A Configuration Manager feature that allows you to create operating system images and deploy those images to target computers) |
| comp., MS | Operating System Deployment Manager | オペレーティング システム展開マネージャー (A security role that grants permissions to administrative users so that they can create, deploy, and manage operating system images) |
| comp. | n operating system firmware | オペレーティング・システム・ファームウェア |
| comp. | n operating system firmware | オペレーティングシステムファームウェア |
| comp. | n operating system image | オペレーティング・システム・イメージ |
| comp. | n operating system image | オペレーティングシステムイメージ |
| comp., MS | operating system volume | オペレーティング システムのボリューム (A volume that contains an operating system (for example, Windows Vista) that can be loaded by Windows Boot Manager. A given system can have multiple operating system volumes. The operating system on the current volume can be started only if it has an entry in the Boot Configuration Data (BCD)) |
| comp. | n operating-system | オペレイティングシステム |
| comp. | n operating-system | オペレーティングシステム |
| auto.ctrl. | real-time operating system | リアルタイムオペレーティングシステム |
| comp. | n real-time Operating System | リアルタイムＯＳ |
| comp. | n two operating systems on a computer | ダブル・ブート |
| comp. | n two operating systems on a computer | ダブルブート |
| comp., MS | Windows operating system | Windows オペレーティング システム (A proprietary software operating system with a graphical user interface (GUI)) |