The PDF file format is ubiquitous in many areas of computing life. It's the format of preference for most documents published on the web and is used in business wherever documents require a fixed layout that can be annotated, but not easily changed.

The two main ways to create and edit PDF files are through Adobe's own Acrobat application or using Nuance's PDF Converter. There are other PDF creating tools, but these two programs hold the lion's share of the market. PDF Converter has just been updated to version 5 and includes a raft of new features, some of which are not matched by Acrobat, even though it's over twice the price.

Additionally, PDF Converter 5 supports Microsoft's XPS document format, a more recent rival to PDF, which may be an advantage in an organisation that supports both types of electronic paper files.

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