| API | Application Programming Interface |
| BLID | Basic Location Info Display |
| UML | Unified Modeling Language |
| FW | Frame Work |
| PSY | Positioning Technology Plug-in. |
| Satellite | A man-made celestial body that orbits a planet. The satellites send the position information to the GPS device. |
| Privacy verification | A mechanism by which the device user is notified the entity which is trying to obtain his/her location information. |
| Firmament | An imaginary sphere where the celestial bodies are plotted. |