<s>
The	O
HP-16C	O
Computer	O
Scientist	O
is	O
a	O
programmable	B-Application
pocket	O
calculator	O
that	O
was	O
produced	O
by	O
Hewlett-Packard	O
between	O
1982	O
and	O
1989	O
.	O
</s>
<s>
It	O
was	O
specifically	O
designed	O
for	O
use	O
by	O
computer	B-Application
programmers	I-Application
,	O
to	O
assist	O
in	O
debugging	O
.	O
</s>
<s>
It	O
is	O
a	O
member	O
of	O
the	O
HP	B-Device
Voyager	I-Device
series	I-Device
of	O
programmable	B-Application
calculators	I-Application
.	O
</s>
<s>
It	O
was	O
the	O
only	O
programmer	B-Application
's	O
calculator	O
ever	O
produced	O
by	O
HP	O
,	O
though	O
many	O
later	O
HP	B-Device
calculators	I-Device
have	O
incorporated	O
most	O
of	O
the	O
16C	O
's	O
functions	O
.	O
</s>
<s>
It	O
also	O
deals	O
with	O
floating-point	B-Algorithm
decimal	O
numbers	O
.	O
</s>
<s>
For	O
consistency	O
with	O
the	O
computer	O
the	O
programmer	B-Application
is	O
working	O
with	O
,	O
the	O
word	O
size	O
can	O
be	O
set	O
to	O
different	O
values	O
from	O
1	O
to	O
64	O
bits	O
.	O
</s>
<s>
Binary-arithmetic	O
operations	O
can	O
be	O
performed	O
as	O
unsigned	B-Algorithm
,	O
one	O
's	O
complement	O
,	O
or	O
two	B-General_Concept
's	I-General_Concept
complement	I-General_Concept
operations	O
.	O
</s>
<s>
This	O
allows	O
the	O
calculator	O
to	O
emulate	O
the	O
programmer	B-Application
's	O
computer	O
.	O
</s>
<s>
A	O
number	O
of	O
specialized	O
functions	O
are	O
provided	O
to	O
assist	O
the	O
programmer	B-Application
,	O
including	O
left	O
-	O
and	O
right-shifting	O
,	O
left	O
-	O
and	O
right-rotating	O
,	O
masking	O
,	O
and	O
bitwise	O
logical	O
operations	O
.	O
</s>
<s>
Apart	O
from	O
programmer	B-Application
functions	O
,	O
the	O
calculator	O
's	O
abilities	O
are	O
limited	O
to	O
basic	O
arithmetic	O
(	O
and	O
reciprocal	O
and	O
square	O
root	O
)	O
,	O
which	O
meant	O
that	O
typical	O
users	O
would	O
also	O
make	O
use	O
of	O
a	O
general	O
scientific	O
calculator	O
.	O
</s>
<s>
Floating-point	B-Algorithm
numbers	I-Algorithm
are	O
only	O
supported	O
for	O
base	O
10	O
.	O
</s>
<s>
However	O
,	O
it	O
is	O
still	O
far	O
more	O
powerful	O
(	O
though	O
also	O
much	O
more	O
expensive	O
)	O
than	O
contemporary	O
competitors	O
such	O
as	O
the	O
non-programmable	O
computer	O
math	O
calculator	O
Casio	O
CM-100	O
or	O
the	O
TI	O
,	O
LCD	B-Device
Programmer	B-Application
or	O
Programmer	B-Application
II	O
.	O
</s>
<s>
The	O
calculator	O
uses	O
the	O
proprietary	O
HP	O
Nut	O
processor	O
produced	O
in	O
a	O
CMOS	B-Device
process	O
and	O
featured	O
continuous	B-Device
memory	I-Device
,	O
whereby	O
the	O
contents	O
of	O
memory	O
are	O
preserved	O
while	O
the	O
calculator	O
is	O
turned	O
off	O
.	O
</s>
<s>
The	O
16C	O
,	O
like	O
all	O
other	O
members	O
of	O
the	O
Voyager	O
series	O
,	O
is	O
itself	O
programmable	B-Application
.	O
</s>
<s>
Keystroke	B-Device
programming	I-Device
is	O
used	O
.	O
</s>
<s>
HP	O
has	O
never	O
(	O
)	O
made	O
another	O
calculator	O
specifically	O
for	O
programmers	B-Application
,	O
but	O
has	O
incorporated	O
many	O
of	O
the	O
HP-16C	O
'	O
s	O
functions	O
in	O
later	O
scientific	O
and	O
graphing	B-Application
calculators	I-Application
,	O
for	O
example	O
the	O
HP-42S	B-Device
(	O
1988	O
)	O
and	O
its	O
successors	O
.	O
</s>
<s>
Like	O
many	O
other	O
vintage	O
HP	B-Device
calculators	I-Device
,	O
the	O
HP-16C	O
is	O
now	O
highly	O
sought-after	O
by	O
collectors	O
.	O
</s>
<s>
Several	O
emulators	B-Application
are	O
available	O
for	O
desktop	O
computers	O
,	O
web	O
browsers	O
,	O
smartphones	B-Application
and	O
other	O
calculators	O
.	O
</s>
<s>
It	O
closely	O
emulates	B-Application
the	O
functionality	O
of	O
the	O
original	O
HP-16C	O
by	O
running	O
the	O
original	O
ROM	O
image	O
in	O
an	O
emulator	B-Application
on	O
an	O
ARM	O
Cortex-M0-based	O
NXP	O
LPC1114	O
processor	O
.	O
</s>
<s>
Deviating	O
from	O
the	O
original	O
,	O
these	O
calculators	O
feature	O
a	O
dot-matrix	O
display	O
,	O
switchable	O
fonts	O
and	O
clock	O
speeds	O
,	O
and	O
,	O
based	O
on	O
a	O
Silicon	O
Labs	O
CP2102	O
converter	O
chip	O
,	O
they	O
come	O
with	O
a	O
USB	B-Protocol
(	O
Mini-B	O
)	O
serial	O
interface	O
to	O
exchange	O
data	O
with	O
a	O
PC	O
etc	O
.	O
</s>
<s>
for	O
backup	O
purposes	O
(	O
and	O
possibly	O
to	O
communicate	O
with	O
applications	O
like	O
PC-based	O
HP-16C	O
emulators	B-Application
)	O
or	O
to	O
update	O
the	O
firmware	O
.	O
</s>
<s>
It	O
still	O
comes	O
with	O
a	O
USB	B-Protocol
Mini-B	O
connector	O
.	O
</s>
<s>
Powering	O
via	O
USB	B-Protocol
is	O
not	O
supported	O
.	O
</s>
