From the article:
"Voice recognition software has been around for a long time, but it’s only in the last few years that it has become accurate enough and simple enough to use with any regularity. It has also been rather expensive, with “basic” versions running around $80-100 and “premium” versions running to several hundred dollars – prompting many buyers to ask what was missing from the lower-priced versions.
If you have Windows Vista, though, you might be surprised to find that voice recognition is built in – and that it’s pretty good. While it takes some getting used to, with a little practice you’ll soon be able to use speech recognition to create and edit documents as well as to control most of the functions of your computer."