<s>
PGPLOT	B-Library
is	O
a	O
device-independent	O
graphics	B-Library
subroutine	I-Library
library	I-Library
written	O
starting	O
in	O
1983	O
by	O
Tim	O
Pearson	O
,	O
a	O
professor	O
at	O
the	O
California	O
Institute	O
of	O
Technology	O
.	O
</s>
<s>
PGPLOT	B-Library
is	O
written	O
mostly	O
in	O
FORTRAN	B-Application
with	O
a	O
modular	O
output	O
API	O
that	O
allows	O
output	O
to	O
several	O
dozen	O
types	O
of	O
plotting	O
device	O
.	O
</s>
<s>
PGPLOT	B-Library
has	O
been	O
widely	O
used	O
in	O
the	O
academic	O
and	O
scientific	O
communities	O
,	O
because	O
it	O
provides	O
both	O
low-level	O
(	O
glyph	O
,	O
point	O
,	O
line	O
,	O
and	O
area	O
)	O
plotting	O
primitives	O
and	O
also	O
high-level	O
facilities	O
for	O
drawing	O
graphs	O
.	O
</s>
<s>
PGPLOT	B-Library
may	O
be	O
redistributed	O
to	O
third	O
parties	O
and	O
modified	O
,	O
but	O
only	O
in	O
binary	O
form	O
.	O
</s>
<s>
The	O
most	O
recent	O
version	O
of	O
PGPLOT	B-Library
is	O
5.2.2	O
,	O
released	O
in	O
February	O
2001	O
,	O
although	O
third	O
parties	O
have	O
written	O
unofficial	O
patches	O
that	O
include	O
support	O
for	O
additional	O
devices	O
,	O
64	O
bit	O
systems	O
,	O
and	O
RGB	O
(	O
true	O
color	O
)	O
plotting	O
.	O
</s>
<s>
PGPLOT	B-Library
provides	O
C	B-Language
and	O
Fortran	B-Application
77	O
interface	O
.	O
</s>
<s>
There	O
are	O
also	O
several	O
user-contributed	O
bindings	O
,	O
such	O
as	O
C++	B-Language
,	O
perl	B-Language
,	O
python	B-Language
,	O
ruby	B-Language
and	O
tcl/tk	B-Operating_System
.	O
</s>
<s>
PGPLOT	B-Library
includes	O
device-independent	O
output	O
to	O
many	O
devices	O
including	O
several	O
types	O
of	O
image	O
file	O
,	O
graphics	O
display	O
terminals	O
and	O
plotters	O
,	O
PostScript	B-Language
devices	O
,	O
and	O
X	B-Operating_System
Window	I-Operating_System
.	O
</s>
<s>
Interactive	O
devices	O
can	O
be	O
used	O
to	O
deliver	O
numeric	O
parameters	O
to	O
the	O
controlling	O
program	O
via	O
a	O
graphics	O
cursor	B-Application
.	O
</s>
<s>
It	O
is	O
known	O
to	O
run	O
on	O
many	O
operating	O
systems	O
,	O
including	O
most	O
Unix-like	B-Operating_System
systems	I-Operating_System
,	O
MacOS	B-Application
,	O
and	O
Microsoft	B-Application
Windows	I-Application
.	O
</s>
<s>
In	O
part	O
because	O
of	O
its	O
age	O
,	O
PGPLOT	B-Library
has	O
several	O
limitations	O
compared	O
to	O
newer	O
packages	O
such	O
as	O
PLplot	B-Language
.	O
</s>
<s>
In	O
particular	O
,	O
PGPLOT	B-Library
supports	O
only	O
8-bit	O
indexed	O
color	O
graphics	O
,	O
and	O
not	O
full	O
RGB	O
color	O
;	O
and	O
there	O
is	O
no	O
clean	O
way	O
to	O
render	O
graphics	O
directly	O
to	O
an	O
array	O
in	O
program	O
memory	O
.	O
</s>
<s>
The	O
library	O
PG2PLplot	O
has	O
been	O
developed	O
to	O
aid	O
the	O
transition	O
from	O
PGPlot	B-Library
to	O
PLplot	B-Language
in	O
Fortran	B-Application
programs	O
.	O
</s>
