The following workflow describes how OIPP OLPD OLPR IPP Print Jobs LPR Print Jobs I I IPP Input LPR Input CUPS Network Printer Convert to PostScript or Raster Filter, Translate, Count Pages Convert to Printer Format Convert LPR to IPP USB/Serial Parallel processes a document. The job of the Ipr printer Olpd anspooler is to control access to the printer so that one print job finishes before the next one starts. The files under /proc are unstructured and contain information about both processes and devices. The goal of migrating device data. sysis interrupts procfs Oudev is to solve some of these shortcomings by