<s>
Berkeley	B-Application
Madonna	I-Application
is	O
a	O
mathematical	O
modelling	O
software	O
package	O
,	O
developed	O
at	O
the	O
University	O
of	O
California	O
at	O
Berkeley	O
by	O
Robert	O
Macey	O
and	O
George	O
Oster	O
.	O
</s>
<s>
It	O
numerically	O
solves	O
ordinary	O
differential	O
equations	O
and	O
difference	O
equations	O
,	O
originally	O
developed	O
to	O
execute	O
STELLA	B-Language
programs	O
.	O
</s>
<s>
In	O
particular	O
,	O
Berkeley	B-Application
Madonna	I-Application
provides	O
the	O
facility	O
of	O
putting	O
parameters	O
onto	O
a	O
slider	O
that	O
can	O
in	O
turn	O
be	O
moved	O
by	O
a	O
user	O
to	O
change	O
the	O
value	O
.	O
</s>
<s>
There	O
are	O
two	O
versions	O
of	O
Berkeley	B-Application
Madonna	I-Application
:	O
a	O
free	O
version	O
with	O
slightly	O
limited	O
functionality	O
and	O
a	O
licensed	O
version	O
that	O
is	O
registered	O
to	O
individuals	O
.	O
</s>
