<s>
JavaOS	B-Application
is	O
an	O
operating	B-General_Concept
system	I-General_Concept
based	O
on	O
a	O
Java	B-Language
virtual	I-Language
machine	I-Language
and	O
predominantly	O
used	O
on	O
SIM	O
cards	O
to	O
run	O
applications	O
on	O
behalf	O
of	O
operators	O
and	O
security	O
services	O
.	O
</s>
<s>
Unlike	O
Windows	B-Application
,	O
macOS	B-Application
,	O
Unix	B-Application
,	O
or	O
Unix-like	B-Operating_System
systems	I-Operating_System
which	O
are	O
primarily	O
written	O
in	O
the	O
C	B-Language
programming	I-Language
language	I-Language
,	O
JavaOS	B-Application
is	O
primarily	O
written	O
in	O
Java	B-Language
.	O
</s>
<s>
It	O
is	O
now	O
considered	O
a	O
legacy	B-Device
system	I-Device
.	O
</s>
<s>
The	O
Java	B-Language
programming	I-Language
language	I-Language
was	O
introduced	O
by	O
Sun	O
in	O
May	O
1995	O
.	O
</s>
<s>
Jim	O
Mitchell	O
and	O
Peter	O
Madany	O
at	O
JavaSoft	O
designed	O
a	O
new	O
operating	B-General_Concept
system	I-General_Concept
,	O
codenamed	O
Kona	O
,	O
written	O
completely	O
in	O
Java	B-Language
.	O
</s>
<s>
In	O
March	O
1996	O
,	O
Tom	O
Saulpaugh	O
joined	O
the	O
now	O
seven-person	O
Kona	O
team	O
to	O
design	O
an	O
input/output	B-General_Concept
(	O
I/O	B-General_Concept
)	O
architecture	O
,	O
having	O
come	O
from	O
Apple	O
as	O
Mac	B-Application
OS	I-Application
engineer	O
since	O
June	O
1985	O
and	O
co-architect	O
of	O
Copland	B-Application
.	O
</s>
<s>
JavaOS	B-Application
was	O
first	O
evangelized	O
in	O
a	O
Byte	O
article	O
.	O
</s>
<s>
In	O
early	O
1997	O
,	O
JavaSoft	O
transferred	O
JavaOS	B-Application
to	O
SunSoft	O
.	O
</s>
<s>
In	O
late	O
1997	O
,	O
Bob	O
Rodriguez	O
led	O
the	O
team	O
to	O
collaborate	O
with	O
IBM	O
who	O
then	O
marketed	O
the	O
platform	O
,	O
accelerated	O
development	O
,	O
and	O
made	O
significant	O
key	O
architectural	O
contributions	O
to	O
the	O
next	O
release	O
of	O
JavaOS	B-Application
,	O
eventually	O
renamed	O
JavaOS	B-Application
for	O
Business	O
.	O
</s>
<s>
IBM	O
indicated	O
its	O
focus	O
was	O
more	O
on	O
network	B-Device
computer	I-Device
thin	B-Device
clients	I-Device
,	O
specifically	O
to	O
replace	O
traditional	O
IBM	B-Operating_System
3270	I-Operating_System
"	O
green	O
screen	O
"	O
and	O
Unix	B-Application
X	B-Protocol
terminals	I-Protocol
,	O
and	O
to	O
implement	O
single	O
application	O
clients	O
.	O
</s>
<s>
The	O
Chorus	B-Operating_System
distributed	O
real-time	O
operating	B-General_Concept
system	I-General_Concept
was	O
used	O
for	O
its	O
microkernel	B-Operating_System
technology	O
.	O
</s>
<s>
This	O
began	O
with	O
Chorus	B-Operating_System
Systèmes	O
SA	O
,	O
a	O
French	O
company	O
,	O
licensing	O
JavaOS	B-Application
from	O
Sun	O
and	O
replacing	O
the	O
earlier	O
JavaOS	B-Application
hardware	O
abstraction	O
layer	O
with	O
the	O
Chorus	B-Operating_System
microkernel	B-Operating_System
,	O
thereby	O
creating	O
the	O
Chorus/Jazz	O
product	O
,	O
which	O
was	O
intended	O
to	O
allow	O
Java	B-Language
applications	O
to	O
run	O
in	O
a	O
distributed	O
,	O
real-time	O
embedded	B-Architecture
system	I-Architecture
environment	O
.	O
</s>
<s>
Then	O
in	O
September	O
1997	O
,	O
it	O
was	O
announced	O
that	O
Sun	O
Microsystems	O
was	O
acquiring	O
Chorus	B-Operating_System
Systèmes	O
SA	O
.	O
</s>
<s>
In	O
1999	O
,	O
Sun	O
and	O
IBM	O
announced	O
the	O
discontinuation	O
of	O
the	O
JavaOS	B-Application
product	O
.	O
</s>
<s>
As	O
early	O
as	O
2003	O
,	O
Sun	O
materials	O
referred	O
to	O
JavaOS	B-Application
as	O
a	O
"	O
legacy	B-Device
technology	I-Device
"	O
,	O
recommending	O
migration	O
to	O
Java	B-Language
ME	I-Language
,	O
leaving	O
the	O
choice	O
of	O
specific	O
OS	O
and	O
Java	B-Language
environment	O
to	O
the	O
implementer	O
.	O
</s>
<s>
JavaSoft	O
granted	O
licenses	O
to	O
more	O
than	O
25	O
manufacturers	O
,	O
including	O
Oracle	B-Application
,	O
Acer	O
,	O
Xerox	O
,	O
Toshiba	O
,	O
and	O
Nokia	O
.	O
</s>
<s>
IBM	O
and	O
Sun	O
announced	O
the	O
cooperation	O
for	O
JavaOS	B-Application
for	O
Business	O
at	O
the	O
end	O
of	O
March	O
1998	O
.	O
</s>
<s>
JavaOS	B-Application
is	O
based	O
on	O
a	O
hardware	O
architecture	O
native	O
microkernel	B-Operating_System
,	O
running	O
on	O
platforms	O
including	O
ARM	B-Architecture
,	O
PowerPC	B-Architecture
,	O
SPARC	B-Architecture
,	O
StrongARM	B-Device
,	O
and	O
IA-32	B-Device
(	O
x86	B-Operating_System
)	O
.	O
</s>
<s>
The	O
Java	B-Language
virtual	I-Language
machine	I-Language
runs	O
on	O
the	O
microkernel	B-Operating_System
.	O
</s>
<s>
All	O
device	B-Application
drivers	I-Application
are	O
written	O
in	O
Java	B-Language
and	O
executed	O
by	O
the	O
virtual	B-Architecture
machine	I-Architecture
.	O
</s>
<s>
A	O
graphics	O
and	O
windowing	O
system	O
implementing	O
the	O
Abstract	B-Language
Window	I-Language
Toolkit	I-Language
(	O
AWT	O
)	O
application	O
programming	O
interface	O
(	O
API	B-General_Concept
)	O
is	O
also	O
written	O
in	O
Java	B-Language
.	O
</s>
<s>
JavaOS	B-Application
was	O
designed	O
to	O
run	O
on	O
embedded	B-Architecture
systems	I-Architecture
and	O
has	O
applications	O
in	O
devices	O
such	O
as	O
set-top	O
boxes	O
,	O
computer	B-Architecture
networking	I-Architecture
infrastructure	O
,	O
and	O
automated	O
teller	O
machines	O
(	O
ATMs	O
)	O
.	O
</s>
<s>
It	O
comes	O
with	O
the	O
JavaStation	B-Device
.	O
</s>
