The last step in the process of printing a file is the actual submission of the file to the operating system’s print service (according to the DEVICE or COMMAND parameters of the printer initialization file.) The details for this final operation are vastly different depending on the A-Shell platform; see the following discussions on A-Shell/Windows or A-Shell/Unix.
For some tips and ideas about on printing PDFs under Unix, see the A-Shell forum discussion "Printing PDF files (Unix to PC)."