Speech recognition (SR) converts spoken words to written text and as a result can be used to provide user interfaces that use spoken input. The Speech Recognizer service enables you to include speech recognition support for your application. Speech recognition requires a special type of software, called an SR engine. The SR engine may be installed with the operating system or at a later time with other software. Speech-enabled packages such as word processors and web browsers, may install their own engines or they can use existing ones. Additional engines are also available through third party manufacturers. These engines are typically designed to only support a specific language and may also target a certain vocabulary; for example, a vocabulary specializing in medical or legal terminology.
