The files which are created in Adobe Acrobat X can be viewed in Adobe Reader. The latest version is the Adobe Reader 10 which comes with a lot of features but it still lags behind when it comes to saving the data or managing editable PDF forms. So if you are sending a form to a person who will use Adobe Reader 10 to fill it, you will have to save the file in Acrobat X in a particular format. Follow this tutorial to learn how to make an editable PDF.