<s>
Imagix	B-Application
4D	I-Application
is	O
a	O
source	O
code	O
analysis	O
tool	O
from	O
Imagix	B-Application
Corporation	O
,	O
used	O
primarily	O
for	O
understanding	O
,	O
documenting	O
,	O
and	O
evolving	O
existing	O
C	O
,	O
C++	O
and	O
Java	O
software	O
.	O
</s>
<s>
Software	B-Application
visualization	I-Application
supports	O
program	O
comprehension	O
.	O
</s>
<s>
Static	O
data	O
flow	O
analysis-based	O
verifications	O
detect	O
problems	O
in	O
variable	O
usage	O
,	O
task	B-Operating_System
interactions	O
and	O
concurrency	B-Operating_System
.	O
</s>
