PDF Print Engine :: Company History ThermoSoft Solutions is division of a separate company that has been serving the printing industry since 1980. TSS was built to serve the technology needs of the trade. Our flagship product, the PDF Print Engine, was developed to make it easy for printers to offer online ordering to their clients. The purpose of the PDF Print Engine is to make order processing more efficient for the printer, and convenient for the client. It does so by allowing the client to pull up their layout, submit their info, view a proof and approve their order...all online! The clients layout is received by the printer - ready to print!