<s>
NuCalc	B-Application
,	O
also	O
known	O
as	O
Graphing	O
Calculator	O
,	O
is	O
a	O
computer	B-Application
software	I-Application
tool	O
made	O
by	O
the	O
company	O
Pacific	B-Application
Tech	I-Application
.	O
</s>
<s>
It	O
is	O
available	O
for	O
OS	B-Operating_System
X	I-Operating_System
(	O
under	O
the	O
name	O
Graphing	O
Calculator	O
)	O
and	O
Microsoft	B-Application
Windows	I-Application
.	O
</s>
<s>
The	O
Graphing	O
Calculator	O
1.0	O
software	O
was	O
bundled	O
for	O
free	O
on	O
all	O
Power	B-Device
Macintosh	I-Device
computers	O
since	O
its	O
introduction	O
in	O
1994	O
.	O
</s>
<s>
This	O
version	O
of	O
Graphing	O
Calculator	O
was	O
secretly	O
developed	O
at	O
Apple	O
by	O
Ron	B-Application
Avitzur	I-Application
,	O
an	O
abandoned	O
contractor	O
who	O
felt	O
obligated	O
to	O
complete	O
the	O
project	O
,	O
and	O
their	O
friend	O
and	O
colleague	O
Greg	B-Application
Robbins	I-Application
.	O
</s>
<s>
They	O
also	O
made	O
a	O
version	O
for	O
older	O
680x0	B-Device
Macintosh	O
computers	O
called	O
NuCalc	B-Application
1.0	O
.	O
</s>
<s>
Later	O
models	O
of	O
Power	B-Device
Macintosh	I-Device
computers	O
included	O
newer	O
versions	O
of	O
the	O
Graphing	O
Calculator	O
program	O
.	O
</s>
<s>
At	O
one	O
time	O
,	O
versions	O
were	O
available	O
for	O
free	O
download	O
for	O
Mac	B-Operating_System
OS	I-Operating_System
9	I-Operating_System
,	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
10.3	I-Operating_System
,	O
and	O
Mac	B-Application
OS	I-Application
X	I-Application
10.4	I-Application
.	O
</s>
<s>
However	O
,	O
these	O
versions	O
may	O
lack	O
some	O
of	O
the	O
features	O
of	O
the	O
original	O
version	O
1.0	O
program	O
and	O
may	O
include	O
promotion	O
for	O
the	O
more	O
advanced	O
,	O
commercial	O
version	O
of	O
the	B-Application
software	I-Application
.	O
</s>
<s>
A	O
Windows	B-Application
version	O
(	O
offered	O
for	O
sale	O
)	O
was	O
at	O
one	O
time	O
renamed	O
NuCalc	B-Application
.	O
</s>
<s>
It	O
has	O
also	O
been	O
ported	O
from	O
C++	B-Language
to	O
SwiftUI	O
.	O
</s>
<s>
Graphing	O
Calculator	O
Version	O
4	O
was	O
published	O
for	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
and	O
Microsoft	B-Application
Windows	I-Application
.	O
</s>
<s>
Pacific	B-Application
Tech	I-Application
also	O
offers	O
free-of-charge	O
downloads	O
of	O
a	O
viewer	O
for	O
saved	O
graphs	O
.	O
</s>
<s>
Subsets	O
of	O
functionality	O
are	O
available	O
as	O
separate	O
applications	O
:	O
Graphing	O
Calculator	O
Lite	O
,	O
Equation	O
Calculator	O
,	O
Data	O
Calculator	O
,	O
2D	O
Grapher	B-Application
,	O
3D	O
Grapher	B-Application
,	O
and	O
4D	O
Grapher	B-Application
.	O
</s>
