In general, newer online documents intended to be widely read, and preserved for a long time, will use Unicode, and can be read with Unicode fonts. Older online documents, or ones prepared with older software, may still use other character sets, and require specialized fonts to display properly.
Here are some resources on Unicode fonts:
This FAQ answer is based in part on responses given by Hugh Ballantyne and other posters on the Book People mailing list.
Home -- About Us -- FAQ -- Get Involved! -- In Progress / Requested -- More Book Links
Books -- News -- Features -- Archives -- The Inside Story
Edited by John Mark Ockerbloom (onlinebooks@pobox.upenn.edu)
OBP copyrights and licenses