PDF can incorporate any font, in any language. You can embed entire fonts into a document. If by chance a font has not been embedded and is not in your computer system, Acrobat Reader can use Adobe Type Manager, included with the Acrobat Reader, to emulate the missing font. There are tools to allow real time page dragging, page forward, page reverse, as well as instant first page and last page access. Adobe provides this speed by page caching.
Pages are also accessible through bookmarks as well as thumbnails.
PDF files are readable on the Internet in any Web browser, thanks to the PDFViewer plug-in. This allows the development of web pages that call for only knowledge of page layout skills. No understanding of HTML or other code is required. You can include links and buttons in documents to other pages in the document, to special note pages, to database fields, to other documents, even to web sites. With the proper viewer and permissions it is possible to append page annotations, copy and paste text and graphics, controlling the entire layout of a page.