<s>
The	O
HP-45	B-Device
is	O
the	O
second	O
scientific	O
pocket	O
calculator	O
introduced	O
by	O
Hewlett-Packard	O
,	O
adding	O
to	O
the	O
features	O
of	O
the	O
HP-35	B-Device
.	O
</s>
<s>
Especially	O
noteworthy	O
was	O
its	O
pioneering	O
addition	O
of	O
a	O
shift	B-Device
key	I-Device
that	O
gave	O
other	O
keys	O
alternate	O
functions	O
.	O
</s>
<s>
An	O
accurate	O
version	O
of	O
the	O
stopwatch	O
mode	O
was	O
officially	O
featured	O
in	O
the	O
1975	O
successor	O
of	O
the	O
HP-45	B-Device
,	O
the	O
HP-55	B-Device
.	O
</s>
<s>
The	O
display	O
of	O
the	O
HP-45	B-Device
hidden	O
timer	O
showing	O
00	O
hours	O
00	O
minutes	O
07	O
seconds	O
and	O
58/100	O
second	O
.	O
</s>
<s>
HP-45	B-Device
functions	O
Arithmetic	O
+	O
,	O
−	O
,	O
×	O
,	O
÷	O
Trigonometry	O
sin	O
,	O
arc	O
sin	O
;	O
cos	O
,	O
arc	O
cos	O
;	O
tan	O
,	O
arc	O
tan	O
(	O
decimal	O
degrees	O
,	O
radians	O
or	O
grads	O
)	O
.	O
</s>
<s>
Several	O
individuals	O
and	O
companies	O
make	O
software	O
emulators	O
of	O
the	O
HP	B-Device
45	I-Device
series	O
calculators	O
.	O
</s>
<s>
Emulates	O
,	O
among	O
other	O
,	O
the	O
HP-45	B-Device
.	O
</s>
<s>
Licensed	O
under	O
the	O
GNU	B-License
General	I-License
Public	I-License
License	I-License
(	O
GPL	B-License
)	O
.	O
</s>
<s>
Available	O
for	O
Microsoft	B-Application
Windows	I-Application
.	O
</s>
<s>
HP-45	B-Device
Emulator	O
written	O
in	O
Java	B-Language
.	O
</s>
<s>
Licensed	O
under	O
the	O
GPL	B-License
3	O
.	O
</s>
<s>
Available	O
for	O
Android	B-Application
and	O
Symbian	B-Operating_System
.	O
</s>
<s>
The	O
HP-45	B-Device
Program	O
ROM	O
was	O
translated	O
to	O
JavaScript	B-Language
to	O
have	O
an	O
exact	O
simulation	O
of	O
the	O
original	O
calculator	O
for	O
use	O
in	O
web	O
browsers	O
.	O
</s>
<s>
Simulates	O
the	O
HP-45	B-Device
and	O
displays	O
and	O
explains	O
its	O
inner	O
workings	O
.	O
</s>
