<s>
Xgraph	B-Application
is	O
the	O
name	O
of	O
at	O
least	O
two	O
applications	O
for	O
2-D	O
interactive	O
plotting	O
,	O
graphing	O
and	O
animation	O
.	O
</s>
<s>
In	O
1984	O
,	O
Carl	O
Hein	O
of	O
Lockheed	O
Martin	O
Advanced	O
Technology	O
Labs	O
developed	O
XGRAPH	B-Application
.	O
</s>
<s>
Hein	O
's	O
XGRAPH	B-Application
is	O
available	O
in	O
binary	O
format	O
for	O
various	O
platforms	O
.	O
</s>
<s>
In	O
1989	O
,	O
David	O
Harrison	O
of	O
the	O
University	O
of	O
California	O
,	O
Berkeley	O
,	O
released	O
xgraph	B-Application
for	O
X11R3	O
of	O
X	B-Operating_System
Window	I-Operating_System
.	O
</s>
<s>
Various	O
versions	O
of	O
Harrison	O
's	O
xgraph	B-Application
are	O
available	O
in	O
source	O
and	O
binary	O
format	O
for	O
various	O
platforms	O
.	O
</s>
<s>
Harrison	O
's	O
xgraph	B-Application
is	O
released	O
under	O
the	O
BSD	B-Operating_System
License	I-Operating_System
.	O
</s>
