Some papers use an advanced feature called HTML styles.
Styles make it possible to specify that parts of the text should be displayed using a particular font, such as the SIL IPA fonts. However, you may find that Netscape Navigator does not correctly display the IPA fonts, where as Internet Explorer does display them correctly. Some papers are supplied as PDF files which can only be read using the Adobe Acrobat Reader software. The reader is free and is available for Windows, Macintosh, and UNIX from Adobe's Acrobat download page. Follow their instructions for installing the reader on your computer and configuring your Web browser to handle PDF files.