<s>
Graphic	B-Application
calculators	I-Application
made	O
by	O
Casio	O
include	O
the	O
touchscreen	O
ClassPad	B-Device
300	I-Device
as	O
well	O
as	O
the	O
models	O
with	O
traditional	O
buttons	O
which	O
can	O
be	O
divided	O
into	O
two	O
main	O
generations	O
listed	O
below	O
.	O
</s>
<s>
Casio	O
produced	O
the	O
world	O
's	O
first	O
graphing	B-Application
calculator	I-Application
,	O
the	O
fx-7000G	B-Device
.	O
</s>
<s>
First	O
produced	O
in	O
1985	O
,	O
these	O
include	O
the	O
fx-7000G	B-Device
,	O
fx-6000G	O
,	O
fx-6500G	O
,	O
fx-7200G	O
,	O
fx-7500G	O
,	O
fx-8000G	O
,	O
fx-8500G	O
.	O
</s>
<s>
Models	O
:	O
fx-7700G	B-Device
,	O
fx-7700GB	O
,	O
fx-8700G	O
,	O
fx-8700GB	O
.	O
</s>
<s>
Also	O
made	O
was	O
the	O
low-end	O
fx-6300G	B-Device
(	O
French	O
:	O
fx-6800G	O
)	O
with	O
a	O
smaller	O
screen	O
and	O
fewer	O
features	O
,	O
and	O
the	O
fx-6200G	O
which	O
did	O
n't	O
have	O
any	O
programming	O
facility	O
.	O
</s>
<s>
Additionally	O
,	O
there	O
were	O
models	O
with	O
24K	O
memory	O
which	O
introduced	O
:	O
dynamic	O
graphing	B-Application
;	O
complex	O
numbers	O
;	O
table	O
mode	O
;	O
a	O
more	O
advanced	O
equation	O
solver	O
;	O
larger	O
matrices	O
(	O
255x255	O
)	O
;	O
sigma	O
calculations	O
;	O
graph	O
solver	O
for	O
roots	O
,	O
intercepts	O
,	O
max	O
and	O
mins	O
.	O
</s>
<s>
There	O
are	O
for	O
accessing	O
the	O
ROM-DOS	B-Operating_System
operating	O
system	O
thus	O
allowing	O
C	B-Language
and	O
Pascal	B-Application
compilers	O
to	O
be	O
used	O
.	O
</s>
<s>
First	O
made	O
in	O
the	O
year	O
2005	O
,	O
the	O
9860	O
models	O
are	O
much	O
faster	O
than	O
previous	O
models	O
and	O
can	O
be	O
programmed	O
in	O
C/C	O
++	O
using	O
the	O
official	O
.	O
</s>
<s>
Announced	O
for	O
January	O
2011	O
,	O
these	O
models	O
have	O
a	O
high-resolution	O
color	O
display	O
(	O
396x224	O
screen	O
with	O
384x216	O
pixels	B-Algorithm
(	O
21x8	O
characters	O
)	O
window	O
with	O
216	O
colors	O
)	O
,	O
a	O
USB	O
2.0	O
port	O
,	O
16	O
MB	O
of	O
flash	O
memory	O
and	O
a	O
feature	O
called	O
Picture	O
Plot	O
.	O
</s>
<s>
Although	O
no	O
official	O
SDK	B-Application
has	O
been	O
released	O
yet	O
,	O
several	O
community	O
SDKs	O
exist	O
using	O
either	O
some	O
of	O
the	O
fx-9860G	O
SDK	B-Application
tools	O
or	O
parts	O
of	O
the	O
GNU	B-Application
toolchain	I-Application
.	O
</s>
<s>
The	O
Prizm	O
Mini-SDK	O
originally	O
required	O
Casio	O
fx-9860	O
SDK	B-Application
to	O
function	O
,	O
which	O
was	O
later	O
replaced	O
by	O
PrizmSDK	O
.	O
</s>
<s>
Subsequent	O
OS	O
updates	O
for	O
the	O
fx-CG50	O
have	O
further	O
differentiated	O
it	O
from	O
its	O
predecessors	O
,	O
for	O
example	O
through	O
the	O
addition	O
of	O
a	O
MicroPython	B-Language
interpreter	O
.	O
</s>
<s>
Casio	B-Device
graphic	I-Device
calculators	I-Device
use	O
a	O
BASIC-like	O
programming	O
language	O
but	O
variable	O
names	O
are	O
restricted	O
to	O
single	O
letters	O
A-Z	O
which	O
are	O
shared	O
by	O
all	O
programs	O
including	O
subroutines	O
which	O
are	O
stored	O
as	O
separate	O
programs	O
.	O
</s>
<s>
Arrays	O
are	O
achieved	O
by	O
overwriting	O
other	O
letters	O
,	O
for	O
example	O
A[0]=A,	O
A[1]=B,	O
A[2]=C	O
.	O
</s>
<s>
However	O
,	O
due	O
to	O
the	O
fact	O
that	O
Casio	O
has	O
n't	O
published	O
a	O
Software	B-Application
Development	I-Application
Kit	I-Application
for	O
the	O
fx-CG10/20/50	O
,	O
it	O
is	O
reasonably	O
hard	O
for	O
a	O
user	O
to	O
create	O
their	O
own	O
game	O
.	O
</s>
<s>
All	O
of	O
the	O
games	O
are	O
coded	O
by	O
the	O
community	O
,	O
based	O
on	O
the	O
community	O
's	O
own	O
SDK	B-Application
,	O
and	O
so	O
feature	O
copies	O
of	O
popular	O
games	O
that	O
could	O
be	O
recoded	O
to	O
work	O
on	O
the	O
device	O
for	O
example	O
Tetris	B-Device
,	O
Pong	B-Application
and	O
Snake	B-Application
;	O
more	O
complex	O
games	O
can	O
also	O
be	O
coded	O
,	O
however	O
due	O
to	O
storage	O
constraints	O
the	O
size	O
is	O
limited	O
.	O
</s>
<s>
Some	O
of	O
the	O
newer	O
Casio	B-Device
graphing	I-Device
calculators	I-Device
have	O
a	O
version	O
of	O
MicroPython	B-Language
built	O
in	O
,	O
allowing	O
the	O
user	O
to	O
upload	O
or	O
write	O
Python	O
scripts	O
on	O
the	O
calculator	O
.	O
</s>
