<s>
The	O
Ruputer	B-Application
is	O
a	O
wristwatch	B-Application
computer	I-Application
developed	O
in	O
1998	O
by	O
Seiko	O
Instruments	O
,	O
a	O
subsidiary	O
of	O
the	O
Seiko	O
Group	O
.	O
</s>
<s>
In	O
the	O
US	O
,	O
it	O
was	O
later	O
marketed	O
as	O
the	O
onHand	B-Application
PC	I-Application
by	O
Matsucom	O
.	O
</s>
<s>
The	O
Ruputer	B-Application
has	O
a	O
16-bit	O
,	O
3.6MHz	O
processor	B-General_Concept
and	O
2	O
MB	O
of	O
non-volatile	O
storage	O
memory	O
and	O
128	O
KB	O
of	O
RAM	B-Architecture
.	O
</s>
<s>
Its	O
display	O
is	O
a	O
102×64	O
pixel	O
monochrome	O
LCD	B-Device
.	O
</s>
<s>
Its	O
main	O
forms	O
of	O
input	O
are	O
a	O
tiny	O
8-direction	O
joystick	B-Device
and	O
6	O
function	O
buttons	O
.	O
</s>
<s>
It	O
also	O
has	O
a	O
serial	B-Protocol
interface	O
and	O
an	O
IR	O
port	O
for	O
communicating	O
with	O
other	O
devices	O
.	O
</s>
<s>
The	O
device	O
was	O
distributed	O
with	O
a	O
software	B-Application
development	I-Application
kit	I-Application
which	O
allows	O
for	O
creation	O
of	O
new	O
software	O
written	O
in	O
the	O
programming	B-Language
language	I-Language
C	I-Language
.	O
</s>
<s>
The	O
successor	O
to	O
the	O
Ruputer	B-Application
is	O
the	O
onHand	B-Application
PC	I-Application
.	O
</s>
<s>
The	O
onHand	B-Application
PC	I-Application
was	O
available	O
in	O
two	O
color	O
styles	O
,	O
clear	O
&	O
black	O
,	O
and	O
a	O
single	O
format	O
.	O
</s>
<s>
While	O
the	O
Ruputer	B-Application
was	O
available	O
with	O
either	O
512Kb	O
of	O
storage	O
(	O
original	O
Ruputer	B-Application
)	O
,	O
2Mb	O
(	O
Ruputer	B-Application
PRO	O
)	O
,	O
or	O
4	O
Mb	O
of	O
flash	B-Device
memory	I-Device
(	O
Ruputer	B-Application
PRO4	O
)	O
,	O
the	O
onHand	B-Application
PC	I-Application
came	O
only	O
in	O
a	O
single	O
version	O
with	O
2Mb	O
of	O
storage	O
.	O
</s>
<s>
The	O
operating	B-General_Concept
system	I-General_Concept
is	O
known	O
as	O
W-PS-DOS	O
version	O
1.16	O
.	O
</s>
<s>
The	O
device	O
features	O
both	O
an	O
icon-based	O
GUI	B-Application
and	O
a	O
text-based	O
user	O
interface	O
.	O
</s>
<s>
There	O
is	O
128Kb	O
of	O
RAM	B-Architecture
,	O
with	O
an	O
additional	O
128Kb	O
of	O
ROM	B-Device
.	O
</s>
<s>
On	O
the	O
device	O
,	O
data	O
can	O
be	O
entered	O
by	O
two	O
methods	O
:	O
The	O
first	O
method	O
is	O
by	O
using	O
the	O
joystick	B-Device
mounted	O
to	O
the	O
front	O
of	O
the	O
watch	O
itself	O
(	O
a	O
method	O
that	O
has	O
been	O
considered	O
clumsy	O
)	O
.	O
</s>
<s>
The	O
second	O
method	O
is	O
by	O
synchronizing	O
data	O
from	O
a	O
full-sized	O
PC	B-Device
using	O
the	O
included	O
software	O
.	O
</s>
<s>
Communication	O
with	O
other	O
devices	O
is	O
either	O
through	O
a	O
38,400	O
-bit/s	O
serial	B-Protocol
port	O
dock	O
,	O
or	O
through	O
the	O
9,600	O
infrared	O
link	O
,	O
the	O
transmitter	O
of	O
which	O
is	O
mounted	O
to	O
the	O
upper	O
middle	O
of	O
the	O
watch	O
.	O
</s>
<s>
The	O
device	O
's	O
screen	O
is	O
a	O
102x64	O
STN	O
4-greyscale	O
LCD	B-Device
which	O
uses	O
a	O
timed	O
backlight	O
to	O
save	O
power	O
.	O
</s>
<s>
Considering	O
the	O
type	O
of	O
system	O
there	O
is	O
a	O
fair	O
amount	O
of	O
software	O
available	O
although	O
some	O
of	O
the	O
programs	O
written	O
for	O
the	O
Ruputer	B-Application
are	O
either	O
entirely	O
in	O
Kanji	O
script	O
or	O
will	O
not	O
run	O
due	O
to	O
the	O
increased	O
speed	O
of	O
the	O
onHand	O
's	O
processor	B-General_Concept
.	O
</s>
<s>
The	O
onHand	B-Application
PC	I-Application
was	O
discontinued	O
by	O
Matsucom	O
on	O
April	O
7	O
,	O
2006	O
.	O
</s>
<s>
The	O
Ruputer	B-Application
and	O
onHand	B-Application
PC	I-Application
failed	O
to	O
achieve	O
widespread	O
success	O
,	O
for	O
a	O
number	O
of	O
reasons	O
.	O
</s>
<s>
Second	O
,	O
their	O
joystick	B-Device
input	O
requires	O
entering	O
text	O
in	O
a	O
process	O
similar	O
to	O
that	O
of	O
entering	O
one	O
's	O
initials	O
in	O
an	O
arcade	O
game	O
high-score	O
list	O
.	O
</s>
<s>
The	O
main	O
competitor	O
for	O
the	O
onHand	B-Application
PC	I-Application
was	O
the	O
Fossil	B-Application
Wrist	I-Application
PDA	I-Application
,	O
a	O
wristwatch-sized	O
PDA	B-Application
.	O
</s>
<s>
The	O
device	O
runs	O
Palm	B-Operating_System
OS	I-Operating_System
4.1.	O
,	O
and	O
like	O
other	O
Palm	B-Operating_System
OS	I-Operating_System
devices	O
,	O
has	O
a	O
virtual	B-Device
keyboard	I-Device
and	O
touch-sensitive	O
screen	O
with	O
handwriting	O
recognition	O
,	O
giving	O
the	O
Wrist	B-Application
PDA	I-Application
an	O
advantage	O
over	O
the	O
joystick	B-Device
input	O
on	O
the	O
onHand	B-Application
PC	I-Application
.	O
</s>
<s>
The	O
Wrist	B-Application
PDA	I-Application
features	O
8Mb	O
of	O
memory	O
,	O
four	O
times	O
the	O
memory	O
in	O
the	O
onHand	O
,	O
although	O
a	O
major	O
disadvantage	O
of	O
the	O
Fossil	O
device	O
was	O
volatile	O
memory	O
-	O
if	O
the	O
battery	O
died	O
,	O
data	O
was	O
lost	O
.	O
</s>
<s>
The	O
Ruputer/onHand	O
uses	O
non-volatile	O
storage	O
,	O
which	O
is	O
not	O
battery-dependent	O
,	O
so	O
data	O
is	O
retained	O
even	O
through	O
battery	O
death	O
.	O
</s>
