<s>
PGF/TikZ	B-Operating_System
is	O
a	O
pair	O
of	O
languages	O
for	O
producing	O
vector	O
graphics	O
(	O
e.g.	O
,	O
technical	O
illustrations	O
and	O
drawings	O
)	O
from	O
a	O
geometric/algebraic	O
description	O
,	O
with	O
standard	O
features	O
including	O
the	O
drawing	O
of	O
points	O
,	O
lines	O
,	O
arrows	O
,	O
paths	O
,	O
circles	O
,	O
ellipses	O
and	O
polygons	O
.	O
</s>
<s>
PGF	O
is	O
a	O
lower-level	O
language	O
,	O
while	O
TikZ	B-Operating_System
is	O
a	O
set	O
of	O
higher-level	O
macros	O
that	O
use	O
PGF	O
.	O
</s>
<s>
The	O
top-level	O
PGF	O
and	O
TikZ	B-Operating_System
commands	O
are	O
invoked	O
as	O
TeX	B-Application
macros	I-Application
,	O
but	O
in	O
contrast	O
with	O
PSTricks	B-Language
,	O
the	O
PGF/TikZ	B-Operating_System
graphics	O
themselves	O
are	O
described	O
in	O
a	O
language	O
that	O
resembles	O
MetaPost	B-Language
.	O
</s>
<s>
Till	O
Tantau	O
is	O
the	O
designer	O
of	O
the	O
PGF	O
and	O
TikZ	B-Operating_System
languages	O
.	O
</s>
<s>
He	O
is	O
also	O
the	O
main	O
developer	O
of	O
the	O
only	O
known	O
interpreter	O
for	O
PGF	O
and	O
TikZ	B-Operating_System
,	O
which	O
is	O
written	O
in	O
TeX	B-Application
.	O
</s>
<s>
PGF	O
is	O
an	O
acronym	O
for	O
"	O
Portable	B-Operating_System
Graphics	I-Operating_System
Format	I-Operating_System
"	O
.	O
</s>
<s>
TikZ	B-Operating_System
was	O
introduced	O
in	O
version	O
0.95	O
of	O
PGF	O
,	O
and	O
it	O
is	O
a	O
recursive	O
acronym	O
for	O
"	O
TikZ	B-Operating_System
ist	O
kein	O
Zeichenprogramm	O
"	O
(	O
German	O
for	O
"	O
TikZ	B-Operating_System
is	O
not	O
a	O
drawing	O
program	O
"	O
)	O
.	O
</s>
<s>
The	O
PGF/TikZ	B-Operating_System
interpreter	O
can	O
be	O
used	O
from	O
the	O
popular	O
LaTeX	B-Application
and	O
ConTeXt	O
macro	O
packages	O
,	O
and	O
also	O
directly	O
from	O
the	O
original	O
TeX	B-Application
.	O
</s>
<s>
Since	O
TeX	B-Application
itself	O
is	O
not	O
concerned	O
with	O
graphics	O
,	O
the	O
interpreter	O
supports	O
multiple	O
TeX	B-Application
output	O
backends	O
:	O
dvips	B-Language
,	O
dvipdfm/dvipdfmx/xdvipdfmx	O
,	O
TeX4ht	B-Protocol
,	O
and	O
pdftex	B-Language
's	O
internal	O
PDF	B-Application
output	O
driver	O
.	O
</s>
<s>
Unlike	O
PSTricks	B-Language
,	O
PGF	O
can	O
thus	O
directly	O
produce	O
either	O
PostScript	B-Language
or	O
PDF	B-Application
output	O
,	O
but	O
it	O
cannot	O
use	O
some	O
of	O
the	O
more	O
advanced	O
PostScript	B-Language
programming	O
features	O
that	O
PSTricks	B-Language
can	O
use	O
due	O
to	O
the	O
"	O
least	O
common	O
denominator	O
"	O
effect	O
.	O
</s>
<s>
PGF/TikZ	B-Operating_System
comes	O
with	O
an	O
extensive	O
documentation	O
;	O
the	O
version	O
3.1.4a	O
of	O
the	O
manual	O
has	O
over	O
1300	O
pages	O
.	O
</s>
<s>
The	O
standard	O
LaTeX	B-Application
picture	O
environment	O
can	O
also	O
be	O
used	O
as	O
a	O
front	O
end	O
for	O
PGF	O
—	O
by	O
merely	O
using	O
the	O
pgfpict2e	O
package	O
.	O
</s>
<s>
One	O
of	O
the	O
major	O
new	O
features	O
of	O
this	O
version	O
was	O
graph	O
drawing	O
using	O
the	O
graphdrawing	O
package	O
,	O
which	O
however	O
requires	O
LuaTeX	B-Language
.	O
</s>
<s>
This	O
version	O
also	O
added	O
a	O
new	O
data	O
visualization	O
method	O
and	O
support	O
for	O
direct	O
SVG	B-Application
output	O
via	O
the	O
new	O
dvisvgm	B-Application
driver	O
.	O
</s>
<s>
Several	O
graphical	O
editors	O
can	O
produce	O
output	O
for	O
PGF/TikZ	B-Operating_System
,	O
such	O
as	O
the	O
KDE	B-Application
program	O
Cirkuit	O
and	O
the	O
math	O
drawing	O
program	O
GeoGebra	B-Language
.	O
</s>
<s>
Export	O
to	O
TikZ	B-Operating_System
is	O
also	O
available	O
as	O
extensions	O
for	O
Inkscape	B-Application
,	O
Blender	B-Application
,	O
MATLAB	B-Language
,	O
matplotlib	B-Language
,	O
Gnuplot	B-Application
,	O
and	O
R	B-Language
.	O
The	O
circuit-macros	O
package	O
of	O
m4	B-Device
macros	I-Device
exports	O
circuit	B-Application
diagrams	I-Application
to	O
TikZ	B-Operating_System
using	O
the	O
dpic	O
-g	O
command	O
line	O
option	O
.	O
</s>
<s>
The	O
dot2tex	O
program	O
can	O
convert	O
files	O
in	O
the	O
DOT	B-Application
graph	I-Application
description	O
language	O
to	O
PGF/TikZ	B-Operating_System
.	O
</s>
<s>
TikZ	B-Operating_System
features	O
libraries	B-Library
for	O
easy	O
drawing	O
of	O
many	O
kinds	O
of	O
diagrams	O
,	O
such	O
as	O
the	O
following	O
(	O
alphabetized	O
by	O
library	O
name	O
)	O
:	O
</s>
<s>
The	O
following	O
images	O
were	O
created	O
with	O
TikZ	B-Operating_System
and	O
show	O
some	O
examples	O
of	O
the	O
range	O
of	O
graphic	O
types	O
that	O
can	O
be	O
produced	O
.	O
</s>
