This is an advertisement for the printing options compatible with the Xerox 820 and 820-II personal computers. The Xerox 20 CPS Printer was most suitable for low-to-moderate volume printing needs. At the time, Xerox claimed that for many stand-alone word processing and data processing applications, it was as much printer as you will ever need. The Xerox 40 CPS printer was for larger volumes of documents. This printer contained a bidirectional printing speed of 40 characters-per-second.