"
The Mother of All Demos" is a name given retrospectively to
Douglas Engelbart's December 9, 1968, computer demonstration at the
Fall Joint Computer Conference in
San Francisco. The live demonstration featured the introduction of a complete computer hardware and software system called the
oN-Line System or more commonly, NLS. The 90-minute presentation essentially demonstrated almost all the fundamental elements of modern personal computing:
windows,
hypertext, graphics, efficient navigation and command input,
video conferencing, the
computer mouse,
word processing,
dynamic file linking,
revision control, and a
collaborative real-time editor (collaborative work). Engelbart's presentation was the first to publicly demonstrate all these elements in a single system. The demonstration was highly influential and spawned similar projects at
Xerox PARC in the early 1970s. The underlying technologies influenced both the Apple
Macintosh and
Microsoft Windows graphical user interface operating systems in the 1980s and 1990s.