<s>
Pocket	B-Application
Viewer	I-Application
(	O
Casio	O
PV	O
)	O
was	O
a	O
model	O
range	O
of	O
personal	B-Application
digital	I-Application
assistants	I-Application
(	O
PDAs	B-Application
)	O
developed	O
by	O
Casio	O
around	O
the	O
turn	O
of	O
the	O
21st	O
Century	O
.	O
</s>
<s>
Pocket	B-Application
Viewer	I-Application
was	O
a	O
model	O
range	O
of	O
PDAs	B-Application
from	O
Casio	O
.	O
</s>
<s>
Early	O
models	O
used	O
Intel	B-Operating_System
x86	I-Operating_System
based	O
processors	O
(	O
manufactured	O
by	O
NEC	O
)	O
.	O
</s>
<s>
The	O
functionality	O
of	O
the	O
pocket	B-Application
viewers	I-Application
extended	O
beyond	O
the	O
digital	O
diary	O
segment	O
and	O
targeted	O
consumers	O
who	O
needed	O
more	O
compute	O
power	O
in	O
their	O
personal	O
organizers	O
.	O
</s>
<s>
The	O
pocket	B-Application
viewers	I-Application
competed	O
directly	O
with	O
the	O
then	O
market	O
leader	O
in	O
the	O
segment	O
the	O
Palm-pilots	B-Application
.	O
</s>
<s>
The	O
pocket	B-Application
viewers	I-Application
,	O
weighing	O
under	O
5	O
ounces	O
,	O
were	O
light	O
and	O
portable	O
.	O
</s>
<s>
The	O
face	O
of	O
the	O
device	O
was	O
almost	O
entirely	O
covered	O
by	O
a	O
monochrome	O
liquid	B-Device
crystal	I-Device
display	I-Device
.	O
</s>
<s>
Towards	O
the	O
bottom	O
of	O
the	O
LCD	B-Device
there	O
were	O
a	O
few	O
navigation	O
keys	O
.	O
</s>
<s>
The	O
lower	O
most	O
part	O
of	O
the	O
LCD	B-Device
had	O
quick	O
short	O
cuts	O
to	O
the	O
standard	O
applications	O
permanently	O
indicated	O
.	O
</s>
<s>
The	O
standard	O
applications	O
available	O
on	O
the	O
pocket	B-Application
viewer	I-Application
include	O
Expense	O
,	O
PVsheet	O
,	O
Quickmemo	O
,	O
Contacts	O
,	O
Scheduler	O
,	O
ToDo	O
list	O
,	O
Reminder/Calendar	O
and	O
Alarm	O
.	O
</s>
<s>
The	O
pocket	B-Application
viewer	I-Application
did	O
not	O
have	O
in-built	O
hand	O
writing	O
recognition	O
support	O
.	O
</s>
<s>
Pocket	B-Application
viewers	I-Application
used	O
conventional	O
2	O
x	O
AAA	O
batteries	O
and	O
under	O
normal	O
use	O
a	O
completely	O
charged	O
battery	O
lasted	O
around	O
2	O
months	O
.	O
</s>
<s>
When	O
not	O
actively	O
being	O
used	O
the	O
pocket	B-Application
viewer	I-Application
switches	O
off	O
the	O
display	O
and	O
goes	O
into	O
power	O
saving	O
mode	O
.	O
</s>
<s>
Except	O
for	O
PV-S1600	O
which	O
used	O
Universal	B-Protocol
Serial	I-Protocol
Bus	I-Protocol
(	O
USB	B-Protocol
)	O
1.0	O
,	O
all	O
the	O
other	O
pocket	B-Application
viewers	I-Application
used	O
a	O
COM	O
(	O
RS-232	O
)	O
port	O
to	O
communication	O
between	O
a	O
personal	O
computer	O
and	O
the	O
pocket	B-Application
viewer	I-Application
.	O
</s>
<s>
Casio	O
made	O
the	O
pocket	B-Application
viewer	I-Application
SDK	O
available	O
.	O
</s>
<s>
Using	O
the	O
SDK	O
users	O
could	O
create	O
their	O
own	O
applications	O
called	O
add-ins	O
,	O
which	O
could	O
be	O
downloaded	O
to	O
the	O
pocket	B-Application
viewer	I-Application
using	O
the	O
synchronization	O
software	O
.	O
</s>
<s>
OWBasic	B-General_Concept
,	O
a	O
third	O
party	O
add-in	O
,	O
provided	O
the	O
easy	O
to	O
learn	O
and	O
use	O
BASIC	O
interpreted	O
programming	O
language	O
on	O
the	O
hand-helds	O
,	O
expanding	O
their	O
functionality	O
to	O
also	O
being	O
programmable	O
hand-held	O
calculators/computers	O
.	O
</s>
<s>
The	O
pocket	B-Application
viewers	I-Application
ability	O
to	O
access	O
the	O
internet	O
was	O
limited	O
.	O
</s>
<s>
The	O
device	O
had	O
a	O
specialized	O
serial	O
port	O
,	O
and	O
could	O
theoretically	O
communicate	O
with	O
other	O
devices	O
using	O
the	O
Serial	B-Protocol
Line	I-Protocol
Internet	I-Protocol
Protocol	I-Protocol
and	O
execute	O
modem	O
AT	B-Device
commands	I-Device
.	O
</s>
<s>
The	O
Casio	O
pocket	B-Application
viewer	I-Application
series	O
was	O
sandwiched	O
between	O
digital	B-Device
diaries	I-Device
and	O
the	O
pocket	B-Device
PC	I-Device
series	O
Casio	B-Application
Cassiopeia	I-Application
.	O
</s>
<s>
Casio	O
discontinued	O
the	O
pocket	B-Application
viewers	I-Application
as	O
the	O
pocket	B-Device
PCs	I-Device
became	O
popular	O
and	O
their	O
price	O
came	O
down	O
.	O
</s>
<s>
OWBasic	B-General_Concept
programs	O
will	O
work	O
as	O
they	O
run	O
in	O
an	O
interpreter	O
.	O
</s>
