Just talk naturally to your computer, using the included microphone, and the words appear on the screen. Because it is fully integrated with WordPerfect and Word, the Naturally Speaking commands are displayed right in the menu bar. Using voice only, the user can speak commands to proofread, revise and edit test or listen to and dictate e-mail. Switching between applications can be accomplished by telling the computer which program to open. Pentium III/500 MHz processor (or equivalent AMD processor); 128 MB RAM;300 MB free hard disk space; Windows XP/Me/2000/98SE/NT4.0;Sound card supporting 16-bit recording;Internet Explorer 5 or higher; CD-ROM drive (required for installation); ScanSoft-approved noise-canceling headset microphone (included); Speakers (required for playback of recorded speech and text-to-speech features);