| Word | Description |
| Add-In | An add-in is a small program that gets "plugged in" to another application. These small programs are unable to run on thier own, relying on the existance of the host application. Add-ins are used to provide extended functionality not originally available in the host application. |
| Microsoft Outlook | Microsoft's Premiere e-mail application. It provides an integrated solution for managing your e-mail, tasks, and schedule. |