Head's up - this book was published in 1994! Check out Excel 2019 For Dummies for the most up-to-date information! I imagine you landed here because you're trying to figure out Excel and know the For Dummies books are a great way to find fast answers. Just so you know, this edition of Excel For Dummies covers a version of the application that's been updated 10 times since we published the book. For the most current info, search for "Excel 2019 For Dummies." The good news is Excel hasn't changed so much in all those years, so a lot of this book is still usable. We're humbled that people still give it great reviews. The better news is there's a version of Excel For Dummies for every version of the application released since then. If you don't want to take your chances on a book published before there was a Google or an Amazon, look for the version of the book specific to the version of Excel you're using, such as Excel 2019 All-in-One For Dummies.