<s>
Calculator	B-Application
is	O
a	O
basic	O
calculator	B-Application
application	O
made	O
by	O
Apple	O
Inc	O
.	O
and	O
bundled	O
with	O
its	O
macOS	B-Application
,	O
iOS	B-Application
,	O
and	O
watchOS	B-Device
operating	O
systems	O
.	O
</s>
<s>
Scientific	O
mode	O
supports	O
exponents	O
and	O
trigonometric	O
functions	O
,	O
and	O
programmer	O
mode	O
gives	O
the	O
user	O
access	O
to	O
more	O
options	O
related	O
to	O
computer	B-General_Concept
programming	I-General_Concept
.	O
</s>
<s>
The	O
Calculator	B-Application
program	O
has	O
a	O
long	O
associated	O
history	O
with	O
the	O
beginning	O
of	O
the	O
Macintosh	B-Device
platform	O
,	O
where	O
a	O
simple	O
four-function	O
calculator	B-Application
program	O
was	O
a	O
standard	O
desk	B-Application
accessory	I-Application
from	O
the	O
earliest	O
system	O
versions	O
.	O
</s>
<s>
Though	O
no	O
higher	O
math	O
capability	O
was	O
included	O
,	O
third-party	O
developers	O
provided	O
upgrades	O
,	O
and	O
Apple	O
released	O
the	O
Graphing	B-Application
Calculator	I-Application
application	O
with	O
the	O
first	O
PowerPC	B-Architecture
release	O
(	O
7.1.2	O
)	O
of	O
the	O
Mac	B-Application
OS	I-Application
,	O
and	O
it	O
was	O
a	O
standard	O
component	O
through	O
Mac	B-Operating_System
OS	I-Operating_System
9	I-Operating_System
.	O
</s>
<s>
Apple	O
also	O
ships	O
a	O
different	O
application	O
with	O
macOS	B-Application
called	O
Grapher	B-Application
for	O
this	O
purpose	O
.	O
</s>
<s>
A	O
calculator	B-Application
function	O
has	O
been	O
included	O
with	O
iOS	B-Application
since	O
its	O
launch	O
on	O
iPhone	B-Device
and	O
iPod	B-Device
Touch	I-Device
.	O
</s>
<s>
However	O
,	O
iPads	B-Operating_System
have	O
never	O
had	O
a	O
first	O
party	O
calculator	B-Application
application	O
.	O
</s>
<s>
A	O
native	O
calculator	B-Application
function	O
was	O
added	O
to	O
the	O
Apple	B-Device
Watch	I-Device
with	O
watchOS	B-Device
6	O
,	O
which	O
included	O
a	O
dedicated	O
button	O
for	O
calculating	O
tips	O
.	O
</s>
<s>
Calculator	B-Application
has	O
Reverse	O
Polish	O
notation	O
support	O
,	O
and	O
can	O
also	O
speak	O
the	O
buttons	O
pressed	O
and	O
result	O
returned	O
.	O
</s>
<s>
The	O
calculator	B-Application
also	O
includes	O
some	O
basic	O
conversion	O
functions	O
to	O
convert	O
between	O
units	O
in	O
the	O
following	O
categories	O
:	O
</s>
<s>
Since	O
the	O
release	O
of	O
Mac	B-Application
OS	I-Application
X	I-Application
Leopard	I-Application
,	O
simple	O
arithmetic	O
functions	O
can	O
be	O
calculated	O
from	O
the	O
Spotlight	B-Application
feature	O
.	O
</s>
<s>
A	O
Dashboard	B-Application
Calculator	B-Application
widget	O
was	O
included	O
in	O
all	O
versions	O
of	O
macOS	B-Application
from	O
Mac	B-Application
OS	I-Application
X	I-Application
Tiger	I-Application
onwards	O
until	O
Mojave	B-Device
,	O
after	O
which	O
Dashboard	B-Application
was	O
discontinued	O
.	O
</s>
<s>
With	O
the	O
release	O
of	O
OS	B-Device
X	I-Device
Yosemite	I-Device
,	O
unit	O
conversion	O
functions	O
were	O
added	O
to	O
the	O
Spotlight	B-Application
calculator	B-Application
,	O
as	O
well	O
as	O
a	O
simple	O
calculator	B-Application
widget	O
available	O
in	O
the	O
Notification	B-Operating_System
Center	I-Operating_System
.	O
</s>
<s>
The	O
Calculator	B-Application
appeared	O
first	O
as	O
a	O
desk	B-Application
accessory	I-Application
in	O
first	O
version	O
of	O
Macintosh	B-Application
System	I-Application
for	O
the	O
1984	O
Macintosh	B-Device
128k	I-Device
.	O
</s>
<s>
Its	O
original	O
incarnation	O
was	O
developed	O
by	O
Chris	O
Espinosa	O
and	O
its	O
appearance	O
was	O
designed	O
,	O
in	O
part	O
,	O
by	O
Steve	O
Jobs	O
when	O
Espinosa	O
,	O
flustered	O
by	O
Jobs	O
's	O
dissatisfaction	O
with	O
all	O
of	O
his	O
prototype	O
designs	O
,	O
conceived	O
an	O
application	O
called	O
The	O
Steve	O
Jobs	O
Roll	O
Your	O
Own	O
Calculator	B-Application
Construction	O
Set	O
that	O
allowed	O
Jobs	O
to	O
tailor	O
the	O
look	O
of	O
the	O
calculator	B-Application
to	O
his	O
liking	O
.	O
</s>
<s>
Its	O
design	O
was	O
maintained	O
with	O
the	O
same	O
basic	O
math	O
operations	O
until	O
the	B-Operating_System
final	I-Operating_System
release	I-Operating_System
of	I-Operating_System
classic	I-Operating_System
Mac	I-Operating_System
OS	I-Operating_System
in	O
2001	O
.	O
</s>
<s>
The	O
Calculator	B-Application
app	O
is	O
not	O
available	O
on	O
any	O
of	O
Apple	O
's	O
iPad	B-Operating_System
devices	O
.	O
</s>
<s>
This	O
is	O
the	O
result	O
of	O
a	O
misunderstanding	O
during	O
the	O
iPad	B-Operating_System
's	O
software	O
development	O
between	O
Steve	O
Jobs	O
and	O
Scott	O
Forstall	O
,	O
Apple	O
's	O
software	O
chief	O
at	O
the	O
time	O
.	O
</s>
<s>
Forstall	O
thought	O
that	O
he	O
should	O
just	O
scale	O
the	O
iPhone	B-Device
Calculator	B-Application
app	O
to	O
fit	O
the	O
iPad	B-Operating_System
proportions	O
.	O
</s>
<s>
One	O
month	O
before	O
the	O
first-generation	B-Operating_System
iPad	I-Operating_System
's	O
release	O
,	O
Jobs	O
asked	O
him	O
about	O
the	O
new	O
Calculator	B-Application
design	O
adapted	O
for	O
the	O
iPad	B-Operating_System
,	O
which	O
had	O
not	O
been	O
developed	O
.	O
</s>
<s>
,	O
Apple	O
has	O
not	O
released	O
an	O
official	O
calculator	B-Application
app	O
for	O
the	O
iPad	B-Operating_System
because	O
its	O
development	O
has	O
been	O
a	O
low	O
priority	O
at	O
the	O
company	O
since	O
then	O
.	O
</s>
<s>
In	O
2020	O
,	O
American	O
tech	O
YouTuber	O
Marques	O
Brownlee	O
interviewed	O
Craig	O
Federighi	O
and	O
asked	O
him	O
why	O
the	O
iPad	B-Operating_System
still	O
does	O
not	O
have	O
a	O
default	O
calculator	B-Application
app	O
,	O
and	O
he	O
said	O
,	O
"	O
That	O
day	O
may	O
come.	O
"	O
</s>
