<s>
The	O
Advanced	B-Application
Continuous	I-Application
Simulation	I-Application
Language	I-Application
,	O
or	O
ACSL	O
(	O
pronounced	O
"	O
axle	O
"	O
)	O
,	O
is	O
a	O
computer	B-Language
language	I-Language
designed	O
for	O
modeling	O
and	O
evaluating	O
the	O
performance	O
of	O
continuous	O
systems	O
described	O
by	O
time-dependent	O
,	O
nonlinear	O
differential	O
equations	O
.	O
</s>
<s>
Like	O
SIMCOS	B-Language
and	O
TUTSIM	B-Application
,	O
ACSL	O
is	O
a	O
dialect	O
of	O
the	O
Continuous	O
System	O
Simulation	O
Language	O
(	O
CSSL	O
)	O
,	O
originally	O
designed	O
by	O
the	O
Simulation	O
Councils	O
Inc	O
(	O
SCI	O
)	O
in	O
1967	O
in	O
an	O
attempt	O
to	O
unify	O
the	O
continuous	O
simulations	O
field	O
.	O
</s>
<s>
Working	O
from	O
an	O
equation	O
description	O
of	O
the	O
problem	O
or	O
a	O
block	B-Application
diagram	I-Application
,	O
the	O
user	O
writes	O
ACSL	O
statements	O
to	O
describe	O
the	O
system	O
under	O
investigation	O
.	O
</s>
<s>
An	O
important	O
feature	O
of	O
ACSL	O
is	O
its	O
sorting	O
of	O
the	O
continuous	O
model	O
equations	O
,	O
in	O
contrast	O
to	O
general	O
purpose	O
programming	O
languages	O
such	O
as	O
Fortran	B-Application
where	O
program	O
execution	O
depends	O
critically	O
on	O
statement	O
order	O
.	O
</s>
<s>
Typical	O
areas	O
in	O
which	O
ACSL	O
is	O
currently	O
applied	O
include	O
control	O
system	O
design	O
,	O
aerospace	O
simulation	O
,	O
chemical	O
process	O
dynamics	O
,	O
power	O
plant	O
dynamics	O
,	O
plant	O
and	O
animal	O
growth	O
,	O
toxicology	O
models	O
,	O
vehicle	O
handling	O
,	O
microprocessor	B-Architecture
controllers	O
,	O
and	O
robotics	O
.	O
</s>
