What is it?
Unified English Resources for Dragon NaturallySpeaking, a speech recognition software package developed and sold by Nuance Communications for Windows PCs. NaturallySpeaking uses a minimal user interface. As an example, dictated words appear in a floating tooltip as they are spoken, and when the speaker pauses, the program transcribes the words into the active window at the location of the cursor.
Description of dd10renx.dll from Nuance Communications
“Dragon Dictation is an easy-to-use voice recognition application powered by Dragon NaturallySpeaking that allows you to easily speak and instantly see your text or email messages. In fact, it’s up to five times faster than typing on the keyboard. Dragon NaturallySpeaking Home speech recognition software ignites new levels of creativity and convenience by letting you interact with your PC using your voice. Dragon recognizes what you say and how you say it so you can turn talk into text and enjoy using your voice to command your PC and applications. Say words and they appear on your screen - three times faster than typing. Use your favorite applications to dictate documents, send email, search the Web, or network with friends and family. Speak simple voice commands to launch applications, select menu items, "press" keys, save files, or switch from one window to another.”