The reason we include these on the text Web site is so we can continually update URLs if they go out of date. We will do our best to keep this list up to date so you can complete the Taking it to the Net exercises in your text. So you may notice that some of the URLs are different from the ones that appear in the text. They should still direct you to the same website or at least to a similar one that will still allow you to complete the exercise described in the text. If you come across any of these links that are no longer working, please send me an email at sarah_reed@mcgraw-hill.com and we’ll update the link with a working URL.