List of useful definitions for specific terms used in this document
| MMS | Mobile Messaging Solutions, Inc. |
| SMS | Short Message Service, also known as “text-messaging” |
| MO | Mobile Originated message – an SMS message that is sent from a mobile phone to an application |
| MT | Mobile Terminated message – an SMS message that is sent to a mobile phone from an application |
| MIN | Mobile Identification Number (a wireless subscriber’s phone number), also called MDN (Mobile Directory Number) |
| URL | Uniform Resource Locator |
| HTTP GET | Hypertext Transfer Protocol GET is the communication protocol used to transfer information to/from MMS servers. The HTTP GET method retrieves the information identified by the Request-URL |
| HTTP POST | Hypertext Transfer Protocol POST is the communication protocol used to transfer information to/from MMS servers. The HTTP POST method requests that a web server accepts and stores the data enclosed in the body of the request URL |
| Keyword | The first word in an incoming (MO) message. Generally used to route specific messaging subsets. |


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