<s>
A	O
medical	B-Application
calculator	I-Application
is	O
a	O
type	O
of	O
medical	O
computer	B-Application
software	I-Application
,	O
whose	O
purpose	O
is	O
to	O
allow	O
easy	O
calculation	O
of	O
various	O
scores	O
and	O
indices	O
,	O
presenting	O
the	O
user	O
with	O
a	O
friendly	O
interface	O
that	O
hides	O
the	O
complexity	O
of	O
the	O
formulas	O
.	O
</s>
<s>
Medical	B-Application
calculators	I-Application
arose	O
because	O
modern	O
medicine	O
makes	O
frequent	O
use	O
of	O
scores	O
and	O
indices	O
that	O
put	O
physicians	O
 '	O
memory	O
and	O
calculation	O
skills	O
to	O
the	O
test	O
.	O
</s>
<s>
The	O
advent	O
of	O
personal	O
computers	O
,	O
the	O
Internet	O
and	O
Web	O
,	O
and	O
more	O
recently	O
personal	B-Application
digital	I-Application
assistants	I-Application
(	O
PDAs	B-Application
)	O
have	O
formed	O
an	O
environment	O
conducive	O
to	O
their	O
development	O
,	O
spread	O
and	O
use	O
.	O
</s>
<s>
Pharma-Insight	O
Inc	O
.	O
in	O
Canada	O
is	O
one	O
of	O
the	O
only	O
companies	O
in	O
the	O
world	O
that	O
is	O
able	O
to	O
make	O
custom	O
specific	O
medical	B-Application
calculators	I-Application
built	O
to	O
perform	O
a	O
specific	O
medical	O
calculation	O
to	O
make	O
dosing	O
or	O
other	O
calculation	O
easy	O
.	O
</s>
<s>
Software-based	O
medical	B-Application
calculators	I-Application
are	O
available	O
for	O
various	O
PDA-platforms	O
,	O
including	O
the	O
iPhone	B-Device
,	O
Palm	B-Operating_System
and	O
Pocket	B-Device
PC	I-Device
.	O
</s>
