<s>
HP	B-Device
calculators	I-Device
are	O
various	O
calculators	B-Application
manufactured	O
by	O
the	O
Hewlett-Packard	O
company	O
over	O
the	O
years	O
.	O
</s>
<s>
Their	O
desktop	O
models	O
included	O
the	O
HP	B-Device
9800	I-Device
series	I-Device
,	O
while	O
their	O
handheld	O
models	O
started	O
with	O
the	O
HP-35	B-Device
.	O
</s>
<s>
With	O
this	O
in	O
mind	O
,	O
HP	O
built	O
the	O
HP	B-Device
9100	I-Device
desktop	O
scientific	O
calculator	B-Application
.	O
</s>
<s>
This	O
was	O
a	O
full-featured	O
calculator	B-Application
that	O
included	O
not	O
only	O
standard	O
"	O
adding	O
machine	O
"	O
functions	O
but	O
also	O
powerful	O
capabilities	O
to	O
handle	O
floating-point	B-Algorithm
numbers	I-Algorithm
,	O
trigonometric	O
functions	O
,	O
logarithms	O
,	O
exponentiation	O
,	O
and	O
square	O
roots	O
.	O
</s>
<s>
This	O
new	O
calculator	B-Application
was	O
well	O
received	O
by	O
the	O
customer	O
base	O
,	O
but	O
William	O
Hewlett	O
saw	O
additional	O
opportunities	O
if	O
the	O
desktop	O
calculator	B-Application
could	O
be	O
made	O
small	O
enough	O
to	O
fit	O
into	O
his	O
shirt	O
pocket	O
.	O
</s>
<s>
The	O
result	O
was	O
the	O
HP-35	B-Device
calculator	B-Application
.	O
</s>
<s>
This	O
calculator	B-Application
provided	O
functionality	O
that	O
was	O
revolutionary	O
for	O
a	O
pocket	O
calculator	B-Application
at	O
that	O
time	O
.	O
</s>
<s>
Through	O
the	O
years	O
,	O
HP	O
released	O
several	O
calculators	B-Application
that	O
varied	O
in	O
their	O
mathematical	O
capabilities	O
,	O
programmability	O
,	O
and	O
I/O	O
capabilities	O
.	O
</s>
<s>
Some	O
of	O
them	O
could	O
be	O
used	O
(	O
via	O
HP-IL	B-Architecture
)	O
to	O
control	O
the	O
instruments	O
other	O
Hewlett	O
Packard	O
divisions	O
produced	O
.	O
</s>
<s>
HP	B-Device
calculators	I-Device
are	O
well	O
known	O
for	O
their	O
use	O
of	O
Reverse	B-Application
Polish	I-Application
Notation	O
(	O
RPN	O
)	O
.	O
</s>
<s>
Programmable	O
HP	B-Device
calculators	I-Device
allow	O
users	O
to	O
create	O
their	O
own	O
programs	O
.	O
</s>
<s>
Below	O
are	O
some	O
of	O
HP	O
's	O
handheld	O
calculator	B-Application
models	O
produced	O
over	O
the	O
years	O
,	O
in	O
numeric	B-Algorithm
rather	O
than	O
chronological	O
order	O
:	O
</s>
<s>
Product	O
Year	O
DescriptionHP	O
9g2003Graphing	O
calculator	B-Application
designed	O
by	O
Kinpo	O
Electronics	O
,	O
Inc.HP	O
9s2002Scientific	O
calculator	B-Application
designed	O
by	O
Kinpo	O
Electronics	O
,	O
Inc.	O
,	O
with	O
the	O
same	O
form	O
factor	O
as	O
the	O
9g	O
and	O
the	O
30SHP-101977Basic	O
four-function	O
calculator	B-Application
with	O
printer	O
and	O
conventional	O
arithmetic	O
entry	O
(	O
no	O
RPN	O
)	O
.HP-10B1987Financial	O
calculatorHP-10C1982Range	O
entry	O
calculator	B-Application
,	O
Scientific	O
Programmable	O
,	O
statistical	O
functions.HP-10S	O
+2012A	O
dual-powered	O
(	O
battery	O
and	O
solar	O
cells	O
)	O
algebraic	O
scientific	O
calculator	B-Application
with	O
2-line	O
dot	O
matrix	O
and	O
segment	O
display.HP-11C1981Scientific	O
Programmable	O
,	O
including	O
hyperbolics	O
,	O
gamma	O
function	O
,	O
statistical	O
functions	O
,	O
and	O
random	O
number	O
generation.HP-10s2007A	O
scientific	O
calculator	B-Application
with	O
more	O
than	O
240	O
built-in	O
functions	O
,	O
with	O
2	O
lines	O
×	O
10	O
digits	O
LCD.HP-12C1981The	O
finance-centric	O
programmable	O
calculator	B-Application
from	O
the	O
Voyager	O
series	O
introduced	O
in	O
the	O
1980s	O
.	O
</s>
<s>
The	O
longest	O
running	O
product	O
in	O
the	O
HP	B-Device
calculator	I-Device
line	O
,	O
it	O
remains	O
in	O
production	O
.	O
</s>
<s>
Various	O
models	O
exist	O
,	O
the	O
latest	O
in	O
2008.HP-14B1988	O
Finance	O
calculator	B-Application
with	O
12	O
digits	O
precision	O
and	O
algebraic	O
logic	O
.	O
</s>
<s>
https://www.calculator.org/calculators/Hewlett-Packard_HP_14B.html	O
HP-15C1982Advanced	O
Scientific	O
Programmable	O
,	O
including	O
hyperbolics	O
,	O
gamma	O
function	O
,	O
combinatorial	O
and	O
statistical	O
functions	O
,	O
random	O
number	O
generation	O
,	O
numerical	O
integration	O
,	O
numerical	O
root	O
finding	O
,	O
plus	O
comprehensive	O
matrix	O
operations	O
and	O
full	O
support	O
for	O
complex	O
numbers.HP-16C1982Computer	O
science	O
programmable	O
calculator	B-Application
that	O
could	O
perform	O
binary	O
arithmetic	O
,	O
base-conversion	O
(	O
decimal	O
,	O
and	O
binary	O
,	O
octal	O
,	O
and	O
hexadecimal	O
)	O
and	O
boolean-logic	O
functions.HP-17B1988Financial	O
calculator	B-Application
superseding	O
the	O
12C	O
,	O
with	O
two-line	O
display	O
,	O
alphanumerics	O
and	O
sophisticated	O
Solve	O
functions	O
rather	O
than	O
step	O
programming	O
.	O
</s>
<s>
Uses	O
the	O
Saturn	B-Application
chip	O
set.HP-18C1986RPL	O
clamshell	O
business	O
calculator.HP-19B1988Financial	O
calculator.HP-19C1977Calculator	O
with	O
RPN	O
and	O
built-in	O
thermal	O
printer	O
.	O
</s>
<s>
Included	O
a	O
programming	O
language	O
with	O
looping	O
and	O
branching.HP	O
20b2008Financial	O
calculator	B-Application
with	O
RPN.HP-20S1988A	O
basic	O
scientific	O
calculator	B-Application
,	O
using	O
infix	O
notation	O
,	O
barely	O
programmable	O
and	O
with	O
no	O
graphing	O
capabilities.HP-211975Scaled-down	O
HP-25.HP-21S1989An	O
algebraic	O
,	O
keystroke	O
programming	O
calculator.HP-22S1988An	O
algebraic	O
scientific/statistics	O
calculator.HP-251975Smaller	O
programmable	O
model	O
with	O
programs	O
up	O
to	O
49	O
steps	O
.	O
</s>
<s>
Version	O
HP-25C	B-Device
was	O
first	O
calculator	B-Application
with	O
"	O
continuous	B-Device
memory	I-Device
"	O
.HP-27S1988The	O
first	O
HP	O
pocket	O
calculator	B-Application
to	O
use	O
algebraic	O
notation	O
only	O
rather	O
than	O
RPN	O
.	O
</s>
<s>
It	O
was	O
a	O
"	O
do	O
all	O
"	O
calculator	B-Application
that	O
included	O
algebraic	O
solver	O
like	O
the	O
HP-18C	B-Device
,	O
statistical	O
,	O
probability	O
and	O
time/value	O
of	O
money	O
calculations	O
.	O
</s>
<s>
The	O
two-push	O
6-key	O
letter	O
typing	O
system	O
was	O
fairly	O
fast	O
after	O
a	O
learning	O
period.HP-28C1987RPN	O
scientific	O
graphing	O
calculator	B-Application
.	O
</s>
<s>
First	O
HP	O
graphing	O
calculator	B-Application
,	O
and	O
introduced	O
the	O
Forth-like	O
RPL	B-Device
,	O
programmable	O
keys	O
,	O
and	O
symbolic	O
equation	O
solving	O
,	O
with	O
2	O
KB	O
of	O
user	O
memory	O
.	O
</s>
<s>
Book-style	O
design	O
(	O
flip-open	O
cover	O
)	O
with	O
keys	O
on	O
both	O
interior	O
halves.HP-28S1988Expansion	O
of	O
HP-28C	B-Device
;	O
32	O
KB	O
of	O
user	O
memory	O
due	O
to	O
customers	O
unexpectedly	O
keeping	O
programs	O
in	O
memory	O
for	O
extended	O
periods	O
.	O
</s>
<s>
Like	O
the	O
HP-28C	B-Device
,	O
this	O
model	O
used	O
the	O
"	O
open-book	O
"	O
physical	O
design	O
.	O
</s>
<s>
Functionally	O
a	O
direct	O
predecessor	O
to	O
the	O
HP-48	B-Device
series	I-Device
,	O
which	O
returned	O
to	O
a	O
more	O
traditional	O
physical	O
design	O
based	O
on	O
the	O
HP-41.HP-29C1977Programmable	O
calculator	B-Application
with	O
RPN	O
.	O
</s>
<s>
An	O
inexpensive	O
variation	O
on	O
the	O
19C	O
printer.HP	O
30b2010Programmable	O
Financial	O
calculator	B-Application
released	O
in	O
2010	O
.	O
</s>
<s>
Successor	O
to	O
the	O
HP-32SII.HP-33C1978Scientific	O
Programmable	O
—	O
successor	O
to	O
the	O
HP-25	B-Device
and	O
HP-25C.HP-34C1979Scientific	O
Programmable	O
calculator	B-Application
.	O
</s>
<s>
First	O
with	O
integration	O
and	O
Root	O
Finding.HP-351972HP	O
'	O
s	O
first	O
pocket	O
calculator	B-Application
,	O
and	O
the	O
world	O
's	O
first	O
pocket	O
calculator	B-Application
with	O
transcendental	O
functions	O
.	O
</s>
<s>
As	O
such	O
,	O
it	O
is	O
regarded	O
as	O
the	O
first	O
"	O
scientific	O
"	O
calculator.HP	O
35s2007Introduced	O
to	O
commemorate	O
the	O
35th	O
anniversary	O
of	O
the	O
HP-35	B-Device
,	O
it	O
is	O
an	O
advanced	O
scientific	O
programmable	O
calculator	B-Application
,	O
featuring	O
algebraic	O
and	O
RPN	O
modes	O
,	O
hyperbolics	O
,	O
statistics	O
,	O
numerical	O
integration	O
,	O
numerical	O
solver	O
,	O
random	O
number	O
generation	O
,	O
equations	O
,	O
and	O
full	O
programmability	O
,	O
using	O
up	O
to	O
32	O
Kb	O
of	O
RAM	O
for	O
programs	O
and	O
data.HP	O
38G1995A	O
simplified	O
graphic	O
model	O
,	O
using	O
infix	O
notation.HP	O
39G2000A	O
successor	O
to	O
the	O
HP-38	O
,	O
using	O
infix	O
notation.HP	O
39gs2006A	O
successor	O
to	O
the	O
HP	B-Device
38G	I-Device
.	O
</s>
<s>
It	O
does	O
not	O
support	O
RPN.HP	O
39gII2011A	O
successor	O
to	O
the	O
HP	B-Device
39gs	I-Device
.	O
</s>
<s>
Nearly	O
identical	O
in	O
features	O
but	O
with	O
a	O
high-resolution	O
screen	O
and	O
internationalized	O
for	O
the	O
Chinese	O
market.HP	O
40G	O
series2000A	O
successor	O
to	O
the	O
HP	B-Device
38G	I-Device
,	O
using	O
infix	O
notation	O
.	O
</s>
<s>
The	O
40G	O
is	O
identical	O
to	O
the	O
39G	O
but	O
adds	O
a	O
computer	O
algebra	O
system.HP-41	O
series	O
1979Three	O
models	O
in	O
this	O
series	O
were	O
released	O
over	O
its	O
lifetime	O
,	O
the	O
41C	O
,	O
41CV	O
,	O
and	O
41CX	O
.	O
</s>
<s>
The	O
41C	O
had	O
user	O
configurable	O
program	O
steps	O
and	O
memory	O
registers	O
,	O
alpha-numeric	O
display	O
,	O
user	O
programmable	O
key	O
mappings	O
,	O
and	O
four	O
expansion	O
ports	O
that	O
could	O
hold	O
additional	O
memory	O
,	O
an	O
interface	O
to	O
HP-IL	B-Architecture
peripherals	O
,	O
a	O
magnetic	O
card	O
reader	O
–	O
writer	O
,	O
or	O
commercial	O
application	O
programs	O
.	O
</s>
<s>
The	O
41CV	O
quintupled	O
the	O
amount	O
of	O
base	O
memory	O
,	O
and	O
the	O
41CX	O
added	O
a	O
clock	O
and	O
some	O
additional	O
functions	O
and	O
memory.HP-42S1988A	O
non-expandable	O
follow-up	O
to	O
the	O
HP-41	B-Device
series	O
.	O
</s>
<s>
It	O
included	O
a	O
two	O
line	O
display	O
(	O
dot	O
addressable	O
)	O
and	O
featured	O
built-in	O
matrix	O
and	O
complex	O
number	O
mathematics.HP-451973Improved	O
version	O
of	O
the	O
HP-35	B-Device
with	O
10	O
memory	O
registers	O
,	O
extra	O
functions	O
and	O
display	O
format	O
selection.HP	O
48	O
series1990Programmable	O
graphic	O
calculators	B-Application
,	O
initially	O
the	O
SX	O
and	O
a	O
year	O
later	O
the	O
cheaper	O
S	O
,	O
and	O
three	O
years	O
later	O
the	O
G	O
and	O
GX	O
with	O
a	O
faster	O
processor	O
and	O
more	O
graphical	O
interface	O
;	O
SX	O
and	O
GX	O
versions	O
had	O
expansion	O
slots	O
.	O
</s>
<s>
Based	O
on	O
the	O
functionality	O
of	O
the	O
HP-28S	B-Device
,	O
but	O
with	O
a	O
return	O
to	O
a	O
traditional	O
appearance	O
(	O
similar	O
to	O
the	O
HP-41	B-Device
series	O
)	O
.	O
</s>
<s>
Uses	O
a	O
filesystem	O
first	O
introduced	O
on	O
the	O
HP-28S	B-Device
.	O
</s>
<s>
Has	O
a	O
real-time	O
clock	O
and	O
an	O
operating	O
system	O
with	O
programmable-action	O
alarms	O
,	O
which	O
could	O
turn	O
on	O
the	O
calculator	B-Application
and	O
run	O
arbitrary	O
user	O
programs	O
at	O
a	O
user-specified	O
time	O
&	O
frequency.HP	O
49/50	O
series1999Enhanced	O
,	O
graphic	O
versions	O
of	O
the	O
HP	B-Device
48	I-Device
series	I-Device
.	O
</s>
<s>
Later	O
models	O
designed	O
by	O
Kinpo	O
Electronics	O
,	O
Inc.HP	O
50g2006The	O
latest	O
member	O
of	O
the	O
HP	B-Device
49	I-Device
series	I-Device
.	O
</s>
<s>
Faster	O
(	O
ARM	O
processor	O
)	O
,	O
larger	O
display	O
,	O
and	O
ability	O
to	O
read/write	O
removable	O
SD	O
memory	O
cards.HP-551975Lower	O
cost	O
version	O
of	O
the	O
HP-65	B-Device
;	O
no	O
magnetic	O
card	O
reader	O
,	O
only	O
49	O
programming	O
steps	O
,	O
but	O
had	O
20	O
registers	O
instead	O
of	O
just	O
nine	O
.	O
</s>
<s>
Only	O
model	O
with	O
an	O
accurate	O
(	O
quartz	O
crystal	O
)	O
stopwatch	O
mode.HP-651974First	O
programmable	O
pocket	O
calculator	B-Application
.	O
</s>
<s>
Programs	O
could	O
be	O
up	O
to	O
100	O
steps	O
in	O
length	O
and	O
could	O
be	O
written	O
to	O
or	O
read	O
from	O
magnetic	O
strips.HP-671976Improved	O
version	O
of	O
the	O
HP-65.HP-71B1984Handheld	O
model	O
natively	O
programmable	O
in	O
an	O
extended	O
BASIC	O
language	O
including	O
a	O
RAM-based	O
filesystem	O
,	O
recursion	O
,	O
multiline	O
user-defined	O
functions	O
and	O
subprogram	O
calling	O
with	O
parameter	O
passing	O
,	O
but	O
also	O
capable	O
of	O
accepting	O
plug-in	O
ROM	O
modules	O
to	O
provide	O
such	O
functionalities	O
as	O
full	O
I/O	O
capabilities	O
to	O
any	O
type	O
of	O
device	O
(	O
printers	O
,	O
mass	O
storage	O
,	O
measurement	O
instruments	O
)	O
,	O
programmability	O
in	O
other	O
languages	O
(	O
Forth	B-Application
,	O
Assembler	O
)	O
,	O
advanced	O
math	O
capabilities	O
(	O
such	O
as	O
matrix	O
operations	O
,	O
support	O
for	O
complex	O
numbers	O
,	O
multidimensional	O
numerical	O
integration	O
and	O
root	O
finding	O
,	O
Fast	O
Fourier	O
Transforms	O
,	O
etc	O
.	O
</s>
<s>
)	O
,	O
and	O
an	O
advanced	O
Calculator	B-Application
Mode	O
capable	O
of	O
executing	O
algebraic	O
expressions	O
one	O
step	O
at	O
a	O
time	O
and	O
undoing	O
individual	O
steps.HP-801973HP	O
'	O
s	O
second	O
handheld	O
calculator	B-Application
,	O
designed	O
for	O
business	O
and	O
including	O
functions	O
for	O
Time	O
Value	O
Of	O
Money	O
,	O
Sum	O
of	O
Digits	O
depreciation	O
and	O
similar.HP-80	O
,	O
The	O
Museum	O
of	O
HP	O
CalculatorsHP-971977Desktop	O
and	O
printing	O
version	O
of	O
the	O
HP-67.HP-300S	O
+2012A	O
dual-powered	O
(	O
battery	O
and	O
solar	O
cells	O
)	O
algebraic	O
scientific	O
calculator	B-Application
with	O
4-lines	O
LCD	O
screen	O
and	O
can	O
display	O
expressions	O
in	O
textbook	O
format.HP	O
Prime2013A	O
"	O
smartphone	B-Application
competitor	O
"	O
with	O
a	O
-inch	O
color	O
touch	O
screen	O
,	O
"	O
apps	O
"	O
,	O
CAS	O
and	O
exam	O
feature	O
that	O
allows	O
both	O
selection	O
of	O
RPN	O
vs.	O
Algebraic	O
vs.	O
textbook	O
and	O
exam	O
format	O
for	O
use	O
on	O
the	O
SAT	O
.	O
</s>
