Adobe's PDF technology is built in to OS X at a low level. One of the primary benefits of this is the ability to save PDF files from any print dialog box, without using Acrobat or another third party solution. Anything that can be printed can be saved as a PDF, using any print driver on the machine, even for a printer that doesn't physically exist.
Rather than rewrite the basic overview of this feature, I will direct you to the Help menu in the Finder, where if you search for 'print PDF', you find several relevant articles. The PDF format is one of the fundamentals of modern data exchange, and if you don't know what it is, you should ask Adobe, rather than your colleagues.