<s>
The	O
Mio	B-Operating_System
P550	I-Operating_System
was	O
one	O
of	O
two	O
PDAs	B-Application
manufactured	O
by	O
Mio	O
as	O
a	O
replacement	O
for	O
the	O
aging	O
Mio	O
A201	O
.	O
</s>
<s>
The	O
Mio	B-Operating_System
P550	I-Operating_System
was	O
a	O
member	O
of	O
Mio	O
's	O
discontinued	O
"	O
Digiwalker	O
"	O
product	O
line	O
,	O
and	O
runs	O
on	O
Windows	O
Mobile	O
5	O
,	O
with	O
Windows	B-Device
Media	I-Device
Player	I-Device
10	I-Device
for	O
portables	O
and	O
portable	O
Office	B-Application
.	O
</s>
<s>
The	O
P550	O
,	O
in	O
common	O
with	O
all	O
other	O
"	O
Digiwalker	O
"	O
PDAs	B-Application
,	O
supports	O
GPS	O
positioning	O
,	O
and	O
features	O
a	O
built-in	O
SiRFstarIII	B-Device
GPS	O
chipset	O
.	O
</s>
<s>
The	O
Mio	B-Operating_System
P550	I-Operating_System
is	O
essentially	O
the	O
same	O
as	O
the	O
Mio	O
P350	O
,	O
only	O
differing	O
in	O
the	O
inclusion	O
of	O
Bluetooth	B-Protocol
and	O
Wi-Fi	O
in	O
the	O
P550	O
,	O
and	O
the	O
difference	O
of	O
colour	O
(	O
the	O
Mio	O
P350	O
is	O
silver-grey	O
,	O
while	O
the	O
Mio	B-Operating_System
P550	I-Operating_System
is	O
black	O
)	O
.	O
</s>
<s>
Inclusion	O
of	O
the	O
extra	O
Bluetooth	B-Protocol
and	O
Wi-Fi	O
antennas	O
was	O
blamed	O
for	O
initial	O
poor	O
GPS	O
,	O
(	O
as	O
compared	O
to	O
the	O
P350	O
)	O
,	O
performance	O
of	O
the	O
P550	O
.	O
</s>
<s>
The	O
P550	O
also	O
features	O
a	O
350	O
nit	O
touch	B-Device
panel	I-Device
.	O
</s>
