SDI APS is a software library that allows applications to generate printed output, PDFs, and CGMs without the limitations of standard Windows printing. It provides superior print quality, reliability, and ease of use compared to standard Windows printing. SDI APS integrates easily into existing applications and supports all major large format printers. It handles tasks like layout previewing, multi-page printing, and scaling to ensure correct output size and orientation. This reduces waste and saves developers time and effort compared to implementing printing functionality themselves.