Shortly, all how-to's will be moved over to PDF format. In order to read, print or save these locally on your computer, you need a PDF viewer installed on your computer.
Adobe Acrobat (free edition) is ideal for this, and is located here:
Adobe - Adobe Reader download - All versions
Most people will already have this software installed on their computers. For those that dont, it is completely free, and I recommend you install it from Adobe's link as above.