<s>
The	O
HP	O
30b	O
(	O
NW238AA	B-Device
,	O
variously	O
codenamed	O
"	O
Big	O
Euro	O
"	O
,	O
"	O
Mid	O
Euro	O
"	O
and	O
"	O
Fox	O
"	O
)	O
is	O
a	O
programmable	B-Application
financial	B-General_Concept
calculator	I-General_Concept
from	O
HP	O
which	O
was	O
released	O
on	O
7	O
January	O
2010	O
.	O
</s>
<s>
This	O
ARM	B-Architecture
powered	O
calculator	O
also	O
has	O
some	O
limited	O
scientific	O
functions	O
which	O
is	O
relatively	O
rare	O
in	O
financial	B-General_Concept
calculators	I-General_Concept
.	O
</s>
<s>
Also	O
,	O
it	O
has	O
a	O
built	O
in	O
Black-Scholes	O
Equation	O
,	O
for	O
calculating	O
theoretical	O
premium	O
for	O
calls	O
and	O
puts	O
,	O
Modified	O
Internal	O
Rate	O
of	O
Return	O
and	O
Financial	B-General_Concept
Management	O
Rate	O
of	O
Return	O
,	O
a	O
first	O
.	O
</s>
<s>
At	O
some	O
point	O
HP	O
planned	O
to	O
release	O
a	O
HP	O
40b	O
,	O
a	O
version	O
of	O
the	O
HP	B-Device
30b	I-Device
with	O
added	O
USB	O
port	O
,	O
the	O
capability	O
to	O
load	O
precompiled	O
programs	O
into	O
the	O
calculator	O
from	O
the	O
PC	O
and	O
to	O
use	O
the	O
calculator	O
as	O
an	O
external	O
keypad	O
for	O
a	O
PC	O
.	O
</s>
<s>
As	O
with	O
the	O
HP	O
20b	O
,	O
the	O
HP30b	O
's	O
firmware	B-Application
can	O
be	O
overwritten	O
(	O
"	O
flashed	O
"	O
)	O
using	O
a	O
computer	O
and	O
a	O
special	O
cable	O
.	O
</s>
<s>
Taking	O
advantage	O
of	O
this	O
facility	O
,	O
a	O
team	O
of	O
HP	O
calculator	O
enthusiasts	O
has	O
produced	O
a	O
firmware	B-Application
for	O
converting	O
the	O
30b	O
into	O
a	O
programmable	B-Application
scientific	O
calculator	O
.	O
</s>
<s>
The	O
resulting	O
WP34S	O
firmware	B-Application
and	O
user	O
's	O
manual	O
can	O
be	O
downloaded	O
free	O
of	O
charge	O
,	O
and	O
a	O
special	O
serial	O
cable	O
and	O
keypad	O
overlay	O
can	O
be	O
purchased	O
for	O
a	O
nominal	O
fee	O
.	O
</s>
<s>
A	O
firmware	B-Application
branch	O
with	O
a	O
complex	O
number	O
lock	O
mode	O
is	O
called	O
WP34C	O
.	O
</s>
<s>
(	O
The	O
community-developed	O
WP	O
43S	O
,	O
which	O
is	O
based	O
on	O
the	O
SwissMicros	B-Device
DM42	I-Device
hardware	O
,	O
is	O
a	O
successor	O
to	O
this	O
project	O
.	O
)	O
</s>
