Editing SunOS (section)

==User interface==
Beginning with SunOS 1.0, the Sun Window System provided a [[Graphical user interface|GUI]] called Suntools,<ref>{{cite book|page=49|title=Windows and Window Based Tools: Beginner's Guide|author=Sun Microsystems|year=1986|url=https://bitsavers.trailing-edge.com/pdf/sun/sunos/3.0/800-1287-03A_Windows_and_Window_Based_Tools_198602.pdf}}</ref> layered on top of lower-level windowing and bitmap libraries;<ref name="sunws"/> this was renamed [[SunView]] in SunOS 3.0.<ref>{{cite book
    | url=http://bitsavers.trailing-edge.com/pdf/sun/sunos/3.0/800-1287-03A_Windows_and_Window_Based_Tools_198602.pdf
    | author=<!--Staff writer(s); no by-line.-->
    | title=Windows and Window Based Tools: Beginner's Guide
    | date=February 1986
    | page = ix
    | publisher=Sun Microsystems
    | access-date = 2023-04-13
    }}</ref> Sun then developed a novel window system called [[NeWS]] that used and extended the [[PostScript]] language and graphics model. In 1989, Sun released [[OpenWindows]], an [[OPEN LOOK]]-compliant [[X11]]-based environment which also supported SunView and NeWS applications. This became the default SunOS GUI in SunOS&nbsp;4.1.1.<ref>{{cite book|page=99|title=SunOS 4.1 Release Manual|author=Sun Microsystems|year=1990|url=http://www.bitsavers.org/pdf/sun/sunos/4.1/800-3802-10A_SunOS_4.1_Release_Manual_199003.pdf}}</ref>