| Subject | English | Japanese |
| comp., MS | File Open Picker contract | ファイル オープン ピッカー コントラクト (A contract that enables developers to create apps that use the file picker to offer files to other apps) |
| comp. | n open file | オープン・ファイル |
| comp. | n open file | オープンファイル |
| comp. | n open file description | オープンファイル記述 |
| comp., MS | Open Received Files | 受信ファイルを開く (An item on the File menu that opens files that the user has received via Communicator conversations) |
| comp., MS | Open Software Descriptor file | Open Software Descriptor ファイル (An XML-based file that instructs the client on how to retrieve the sequenced application from the Application Virtualization Management/Streaming Server and how to run the sequenced application in its virtual environment) |