這是 Qt 的主要名稱空間的列錶。
| Phonon | Contains classes and functions for multimedia applications |
| Phonon::BackendCapabilities | Contains functions to describe the capabilities of the multimedia backend |
| QAudio | 包含用於音頻類的枚舉 |
| QDBus | Contains miscellaneous identifiers used throughout the QtDBus library |
| QGL | Specifies miscellaneous identifiers used in the Qt OpenGL module |
| QSql | Contains miscellaneous identifiers used throughout the Qt SQL library |
| QSsl | Declares enums common to all SSL classes in QtNetwork |
| QTest | Contains all the functions and declarations that are related to the QTestLib tool |
| Qt | 包含用於整個 Qt 庫的其它標識符 |
| QtConcurrent | 使之無需使用低級綫程原語就能編寫多綫程程序的高級 API |
