Publishing Engine Programmer's Guide > The Arbortext Publishing Engine Sub-Process > Arbortext Publishing Engine Document Conversion > Conversion Processing > Producing PDF Output
  
Producing PDF Output
The conversion processor can produce PDF using the Arbortext Publishing Engine with the FOSI print engine or the PTC APP print engine, or it can produce PostScript output.
For information about PDF configuration files, please refer to Print and PDF Configuration Files in Arbortext Editor Help.
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The FOSI and XSL-FO print engines are on sustained support and do not receive enhancements or maintenance fixes. PTC APP is the recommended engine for print output.