There are a lot of different file formats in the world of desktop publishing. Even if you just look at basic word processors there are conflicting file formats. Windows users have a .doc format. People who are on the Mac platform use Pages files. Fans of Open Office on all platforms have the .odf format. That's three formats--and then there's the specialty software. While there is a trend to make all Office suites more compatible with .doc this is only a patch since there is no perfect compatibility. Unless, that is you use a cross platform format. The most widely used and recognized of these is the PDF format.
Aside from its near universality, PDF also has some other impressive advantages.
* Display quality. The quality of images can vary from system to system and program to program. Pdf allows for a certain degree of universalitality.
* Users will have a harder time altering your work. It’s not impossible to alter a PDF, but it is harder then a standard document.