<s>
The	O
Casio	B-Device
FX-850P	I-Device
is	O
a	O
scientific	O
calculator	B-Application
introduced	O
in	O
1987	O
and	O
sold	O
until	O
1999	O
.	O
</s>
<s>
The	O
calculator	B-Application
had	O
a	O
BASIC	O
interpreter	O
,	O
MEMO	O
function	O
,	O
a	O
formula	O
library	O
.	O
</s>
<s>
The	O
built-in	O
8	O
kB	O
memory	O
could	O
be	O
expanded	O
using	O
the	O
optional	O
Casio	O
RP-8	O
(	O
8	O
kB	O
)	O
or	O
RP-33	O
(	O
32	O
kB	O
)	O
RAM	B-Architecture
expansion	O
modules	O
.	O
</s>
<s>
An	O
optional	O
Casio	B-Device
FA-6	I-Device
interface	O
board	O
provided	O
a	O
cassette	B-Device
tape	I-Device
recorder	I-Device
connector	O
,	O
a	O
Centronics	O
printer	O
connector	O
and	O
an	O
RS-232C	O
port	O
.	O
</s>
<s>
The	O
calculator	B-Application
could	O
print	O
data	O
and	O
listings	O
on	O
any	O
Centronics	O
printer	O
;	O
printing	O
graphics	O
required	O
the	O
Casio	O
FP-100	O
plotter-printer	O
.	O
</s>
<s>
Via	O
a	O
serial	O
cable	O
the	O
calculator	B-Application
could	O
connect	O
to	O
a	O
PC	B-Device
or	O
to	O
another	O
Casio	B-Device
FX-850P	I-Device
,	O
allowing	O
the	O
transfer	O
to	O
MEMO	O
and	O
stored	O
programs	O
.	O
</s>
