Since Adobe debuted the PDF file format in the early 1990s, it has become the defacto standard for electronic documents in many markets. While engineers, publishers, and printers push the format to its technical limits with rich media and 3-D content, the general office worker comprises the PDF-using majority. Most business PDFs include text and graphics, and little else. The typical business user needs to view PDFs, edit/update existing PDFs, create PDFs from paper or electronic source fi les, and in some cases control security settings. The use of PDF documents for forms, regulatory compliance, and electronic archives is expanding the need for knowledge workers to digitally sign PDFs, too. Today, many companies offer PDF software. Enterprise decision makers need to find the most cost-effective, complete solutions that enable knowledge workers to create, edit, and convert PDFs to Microsoft Office files. Furthermore, vendors that offer flexible licensing programs help an organization attain predictable, controlled budgeting goals. The best vendors also offer support, knowledgebase self-help on the web, and enterprise deployment tools to maximize an IT department's efficiency in managing the fl ow of business-critical PDF documents throughout the company.