<s>
The	O
Yopy	B-Application
was	O
the	O
name	O
of	O
a	O
series	O
of	O
Personal	B-Application
Digital	I-Application
Assistants	I-Application
(	O
PDA	B-Application
)	O
made	O
by	O
GMate	O
Corporation	O
,	O
also	O
used	O
as	O
a	O
popular	O
PDA	B-Application
Phone	O
in	O
Korea	O
and	O
based	O
on	O
the	O
Linux	B-Application
operating	I-Application
system	I-Application
.	O
</s>
<s>
The	O
Linux	B-Application
Documentation	O
Project	O
considers	O
the	O
Yopy	B-Application
series	O
to	O
be	O
"	O
true	O
Linux	B-Application
PDAs	B-Application
"	O
because	O
their	O
manufacturers	O
install	O
Linux-based	O
operating	B-General_Concept
systems	I-General_Concept
on	O
them	O
by	O
default	O
.	O
</s>
<s>
At	O
the	O
CeBIT	O
2000	O
,	O
GMate	O
introduced	O
the	O
YDK1000	O
,	O
the	O
Yopy	B-Application
Development	O
Kit	O
.	O
</s>
<s>
Without	O
a	O
physical	O
keyboard	B-Device
this	O
device	O
looked	O
very	O
different	O
from	O
later	O
versions	O
.	O
</s>
<s>
It	O
came	O
with	O
an	O
embedded	O
Linux	B-Application
operating	I-Application
system	I-Application
and	O
the	O
W	B-Application
Window	I-Application
System	I-Application
.	O
</s>
<s>
Later	O
also	O
precompiled	O
versions	O
of	O
the	O
X	B-Operating_System
Window	I-Operating_System
System	I-Operating_System
and	O
the	O
IceWM	B-Language
window	B-Application
manager	I-Application
became	O
available	O
.	O
</s>
<s>
The	O
first	O
official	O
model	O
in	O
the	O
Yopy	B-Application
line	O
of	O
PDAs	B-Application
was	O
the	O
YP3000	O
.	O
</s>
<s>
It	O
introduced	O
the	O
clam	O
shell	O
design	O
with	O
a	O
full-Qwerty	O
keyboard	B-Device
,	O
and	O
featured	O
a	O
3.5inch	O
TFT	B-Device
screen	I-Device
.	O
</s>
<s>
It	O
also	O
came	O
with	O
the	O
X	B-Operating_System
Window	I-Operating_System
System	I-Operating_System
and	O
IceWM	B-Language
.	O
</s>
<s>
One	O
of	O
the	O
features	O
of	O
the	O
YP3500	O
is	O
a	O
CDMA	B-Protocol
module	O
,	O
so	O
it	O
can	O
be	O
used	O
as	O
a	O
mobile	O
phone	O
.	O
</s>
<s>
By	O
March	O
2005	O
Gmate	O
had	O
stopped	O
producing	O
and	O
selling	O
the	O
Yopy	B-Application
PDA	B-Application
and	O
closed	O
down	O
its	O
official	O
web	O
sites	O
.	O
</s>
<s>
Because	O
it	O
used	O
the	O
Linux	B-Application
operating	I-Application
system	I-Application
,	O
the	O
Yopy	B-Application
was	O
capable	O
of	O
running	O
a	O
variety	O
of	O
open	B-Application
source	I-Application
software	I-Application
.	O
</s>
