 IBM 6640 inkjet, Xerox 2700 and IBM 6670 laser).From 1981 onwards the IBM PC's introduction of "Code page 437" with 254 printable glyphs (including 40 shapes specifically for drawing forms), and development of Xerox Star-influenced environments such as the Macintosh, GEM and Windows made bit-mapped approaches more desirable, driving cost reductions for laser printing and higher resolution for impact dot matrix printing.Xerox later adapted Diablo's daisy wheel technology into a typewriter that sold for less than $50.