<s>
The	O
Sony	B-Language
Ericsson	I-Language
P800	I-Language
is	O
a	O
smartphone	B-Application
introduced	O
in	O
2002	O
based	O
upon	O
UIQ	B-Language
version	O
2.0	O
(	O
which	O
itself	O
is	O
based	O
upon	O
Symbian	B-Operating_System
OS	I-Operating_System
v7.0	O
)	O
from	O
Sony	O
Ericsson	O
.	O
</s>
<s>
The	O
P800	O
is	O
considered	O
the	O
successor	O
of	O
the	O
Ericsson	B-Language
R380	I-Language
,	O
and	O
initial	O
design	O
work	O
was	O
done	O
within	O
Ericsson	O
,	O
but	O
it	O
was	O
produced	O
after	O
Sony	O
&	O
Ericsson	O
merged	O
their	O
mobile	O
phone	O
businesses	O
.	O
</s>
<s>
The	O
P800	O
uses	O
the	O
UIQ	B-Language
(	O
version	O
2.0	O
)	O
user	B-Application
interface	I-Application
and	O
has	O
a	O
touch	B-Device
screen	I-Device
much	O
like	O
a	O
PDA	B-Application
.	O
</s>
<s>
It	O
is	O
powered	O
by	O
an	O
ARM9	O
processor	O
running	O
at	O
156MHz	O
,	O
which	O
was	O
also	O
used	O
for	O
the	O
successive	O
models	O
Sony	B-Language
Ericsson	I-Language
P900	I-Language
,	O
Sony	B-Language
Ericsson	I-Language
P910	I-Language
.	O
</s>
<s>
The	O
touchscreen	B-Device
displays	O
4,096	O
colours	O
(	O
12-bit	O
colour	O
depth	O
)	O
.	O
</s>
<s>
It	O
was	O
succeeded	O
in	O
2003	O
by	O
the	O
Sony	B-Language
Ericsson	I-Language
P900	I-Language
.	O
</s>
<s>
A	O
long	O
awaited	O
updated	O
version	O
of	O
the	O
"	O
P	O
"	O
series	O
phones	O
,	O
the	O
Sony	B-Operating_System
Ericsson	I-Operating_System
P990	I-Operating_System
was	O
launched	O
at	O
the	O
Symbian	B-Operating_System
Smartphone	B-Application
Show	O
in	O
September	O
2005	O
.	O
</s>
<s>
It	O
is	O
based	O
upon	O
the	O
UIQ3	B-Language
platform	O
(	O
utilizing	O
Symbian	B-Operating_System
OS	I-Operating_System
v9.1	O
)	O
.	O
</s>
<s>
The	O
latest	O
successor	O
is	O
the	O
Sony	B-Language
Ericsson	I-Language
P1	I-Language
,	O
announced	O
on	O
8	O
May	O
2007	O
.	O
</s>
<s>
Whilst	O
using	O
the	O
same	O
UIQ	B-Language
platform	O
as	O
the	O
P990	B-Operating_System
,	O
it	O
has	O
a	O
smaller	O
form	O
factor	O
based	O
on	O
the	O
Sony	B-Language
Ericsson	I-Language
M600	I-Language
and	O
updated	O
hardware	O
.	O
</s>
