| Word | Description |
| ActiveSync | This is the software on the device and desktop that sync with Microsoft technologies such as Microsoft Exchange or Outlook. Also may describe an email account type designed to sync with Microsoft Exchange or Outlook. |
| BES | BlackBerry Enterprise Server. A BES user has their email go through a corporate BES server and not through a personal email server. |
| BIS | BlackBerry Internet Service. This is an email account created by the network provider such as AT&T and is not a corporate email system. |
| OEM | Original Equipment Manufacturer. The company that makes and sells your device, such as HTC/Hewlett-Packard/Samsung. |
| OS | Operating System. This is the software that runs the device and controls it, allowing third party applications to run. |
| PIM | Personal Information Management, typically consisting of Calendar, Tasks, Notes, and Contacts |
| Pocket PC | Windows Mobile device with a Touch Screen and stylus |
| Smartphone | Windows Mobile device without a touch screen. Only navigable with a DPAD and/or keys. |