| HWRM | Hardware Resource Manager |
| Tactile feedback | Term refers to experience, where audio or/and vibration feedback is given to user. HW Resource Manager only provides interface for vibration feedback. |
| Trusted client | A client is considered trusted if the client has non-standard priority defined in the internal policy of HW Resource Manager. A client can be defined as trusted only by S60 or a product. |
Vibra frozen state | Whenever vibra is released, its current state is stored as frozen state. On next reserve, the user can specify that the frozen state be restored. |
| Vibra virtual state | Virtual state is what all control methods affect. If reservation is not suspended, then the actual vibra is also set to the same state. If reservation is suspended, the actual vibra is not affected by any control methods. |