<s>
HP-19B	B-Device
,	O
introduced	O
on	O
4	O
January	O
1988	O
,	O
along	O
with	O
the	O
HP-17B	B-Device
,	O
HP-27S	B-Device
and	O
the	O
HP-28S	B-Device
,	O
and	O
replaced	O
by	O
the	O
HP-19BII	B-Device
(	O
F1639A	O
)	O
in	O
January	O
1990	O
,	O
was	O
a	O
simplified	O
Hewlett	O
Packard	O
business	O
model	O
calculator	B-Application
,	O
like	O
the	O
17B	O
.	O
</s>
<s>
It	O
had	O
a	O
clamshell	O
design	O
,	O
like	O
the	O
HP-18C	B-Device
,	O
HP-28C	B-Device
and	O
28S	O
.	O
</s>
<s>
The	O
calculator	B-Application
included	O
functions	O
for	O
solving	O
financial	O
calculations	O
like	O
time	O
value	O
of	O
money	O
,	O
amortizing	O
,	O
interest	O
rate	O
conversion	O
and	O
cash	O
flow	O
.	O
</s>
<s>
Upscale	O
functionality	O
,	O
at	O
the	O
time	O
of	O
release	O
,	O
included	O
the	O
ability	O
to	O
design	O
your	O
own	O
problem	O
solving	O
equations	O
and	O
storing	O
text	O
directly	O
in	O
the	O
calculator	B-Application
using	O
the	O
letter	O
keyboard	O
on	O
the	O
left	O
side	O
.	O
</s>
<s>
The	O
calculator	B-Application
could	O
also	O
print	O
via	O
a	O
built-in	O
infrared	O
transmitter	O
to	O
a	O
supported	O
infrared	O
printer	O
such	O
as	O
the	O
HP	O
82240A	O
or	O
HP	O
82240B	O
;	O
which	O
allowed	O
you	O
to	O
print	O
out	O
the	O
generated	O
graphs	O
.	O
</s>
