Web documents tend to be formatted for a color CRT output device.
Browsers often only support a Postscript printing model with minimal and unpredictable formatting. The document author has little control over the final output appearance on paper, and would have to 're-author' the document for paper output if desired, perhaps using Acrobat or by sending an entire Postscript file. Some of these shortcomings can be addressed within the browser, within HTML, or both. Style sheets , as proposed by W3C for HTML, are a good place for font information and other specific document formatting references. The possible values of Display would be much more strictly limited, as only fundamental major types exist.