<s>
Java	B-Application
Model	I-Application
Railroad	I-Application
Interface	I-Application
(	O
JMRI	B-Application
)	O
is	O
an	O
open	B-Application
source	I-Application
program	I-Application
for	O
model	O
railroad	O
hobbyists	O
,	O
released	O
under	O
GNU	B-License
General	I-License
Public	I-License
License	I-License
v2	O
.	O
</s>
<s>
It	O
allows	O
users	O
to	O
control	O
LED	O
lights	O
,	O
horn	O
,	O
or	O
switch	O
the	O
railway	O
of	O
hobbyist	O
open-source	B-Application
or	O
commercials	O
closed-sourced	O
trains	O
.	O
</s>
<s>
JMRI	B-Application
is	O
a	O
suite	O
of	O
tools	O
distributed	O
via	O
a	O
single	O
download	B-Application
.	O
</s>
<s>
JMRI	B-Application
's	O
project	O
administrator	O
,	O
Bob	O
Jacobsen	O
,	O
was	O
involved	O
in	O
a	O
legal	O
dispute	O
with	O
Matt	O
Katzer	O
in	O
the	O
United	O
States	O
District	O
Court	O
for	O
the	O
Northern	O
District	O
of	O
California	O
.	O
</s>
