<s>
The	O
Knowledge	B-Device
Navigator	I-Device
is	O
a	O
concept	O
described	O
by	O
former	O
Apple	O
Computer	O
CEO	B-Application
John	O
Sculley	O
in	O
his	O
1987	O
book	O
,	O
Odyssey	O
:	O
Pepsi	O
to	O
Apple	O
.	O
</s>
<s>
It	O
describes	O
a	O
device	O
that	O
can	O
access	O
a	O
large	O
networked	O
database	O
of	O
hypertext	O
information	O
,	O
and	O
use	O
software	B-General_Concept
agents	I-General_Concept
to	O
assist	O
searching	O
for	O
information	O
.	O
</s>
<s>
All	O
of	O
them	O
featured	O
a	O
tablet	O
style	O
computer	O
with	O
numerous	O
advanced	O
capabilities	O
,	O
including	O
an	O
excellent	O
text-to-speech	O
system	O
with	O
no	O
hint	O
of	O
"	O
computerese	O
"	O
,	O
a	O
gesture	O
based	O
interface	O
resembling	O
the	O
multi-touch	B-Application
interface	O
later	O
used	O
on	O
the	O
iPhone	B-Device
and	O
an	O
equally	O
powerful	O
speech	O
understanding	O
system	O
,	O
allowing	O
the	O
user	O
to	O
converse	O
with	O
the	O
system	O
via	O
an	O
animated	O
"	O
butler	O
"	O
as	O
the	O
software	B-General_Concept
agent	I-General_Concept
.	O
</s>
<s>
While	O
working	O
for	O
Apple	O
CEO	B-Application
John	O
Sculley	O
at	O
the	O
time	O
,	O
Arora	O
built	O
the	O
technology	O
to	O
show	O
fluid	O
access	O
to	O
linked	O
data	O
displayed	O
in	O
a	O
friendly	O
manner	O
an	O
emerging	O
area	O
of	O
research	O
at	O
Apple	O
.	O
</s>
<s>
The	O
Knowledge	B-Device
Navigator	I-Device
video	O
premiered	O
in	O
1987	O
at	O
Educom	O
,	O
the	O
leading	O
higher	O
education	O
conference	O
,	O
in	O
a	O
keynote	O
by	O
John	O
Sculley	O
,	O
with	O
demos	O
of	O
multimedia	O
,	O
hypertext	O
and	O
interactive	O
learning	O
directed	O
by	O
Bud	O
Colligan	O
.	O
</s>
<s>
The	O
software	B-General_Concept
agent	I-General_Concept
in	O
the	O
video	O
has	O
been	O
discussed	O
in	O
the	O
domain	O
of	O
human	O
–	O
computer	O
interaction	O
.	O
</s>
<s>
It	O
was	O
criticized	O
as	O
being	O
an	O
unrealistic	O
portrayal	O
of	O
the	O
capacities	O
of	O
any	O
software	B-General_Concept
agent	I-General_Concept
in	O
the	O
foreseeable	O
future	O
,	O
or	O
even	O
in	O
a	O
distant	O
future	O
.	O
</s>
<s>
Some	O
visions	O
put	O
forth	O
by	O
proponents	O
of	O
the	O
Semantic	O
Web	O
have	O
been	O
likened	O
to	O
that	O
of	O
the	O
Knowledge	B-Device
Navigator	I-Device
by	O
Marshall	O
and	O
Shipman	O
,	O
who	O
argue	O
that	O
some	O
of	O
these	O
visions	O
"	O
ignore	O
the	O
difficulty	O
of	O
scaling	O
knowledge-based	O
systems	O
to	O
reason	O
across	O
domains	O
,	O
like	O
Apple	O
's	O
Knowledge	B-Device
Navigator	I-Device
,	O
"	O
and	O
conclude	O
that	O
,	O
as	O
of	O
2003	O
,	O
"	O
scenarios	O
of	O
the	O
complexity	O
of	O
[	O
a	O
previously	O
quoted ]	O
Knowledge	O
Navigator-like	O
approach	O
to	O
interacting	O
with	O
people	O
and	O
things	O
in	O
the	O
world	O
seem	O
unlikely.	O
"	O
</s>
<s>
The	O
notion	O
of	O
Siri	B-Application
was	O
firmly	O
planted	O
at	O
Apple	O
25	O
years	O
ago	O
though	O
“	O
Knowledge	B-Device
Navigator	I-Device
”	O
with	O
the	O
voice	O
of	O
the	O
assistant	O
was	O
only	O
a	O
concept	O
prototype	O
.	O
</s>
<s>
In	O
October	O
2011	O
,	O
Apple	O
relaunched	O
Siri	B-Application
,	O
a	O
voice	O
activated	O
personal	O
assistant	O
software	O
vaguely	O
similar	O
to	O
that	O
aspect	O
of	O
the	O
Knowledge	B-Device
Navigator	I-Device
just	O
a	O
month	O
after	O
their	O
initial	O
prediction	O
.	O
</s>
