<s>
QCAD	B-Language
is	O
a	O
computer-aided	B-Application
design	I-Application
(	O
CAD	B-Application
)	O
software	O
application	O
for	O
2D	O
design	O
and	O
drafting	O
.	O
</s>
<s>
It	O
is	O
available	O
for	O
Linux	B-Application
,	O
Apple	O
macOS	B-Application
,	O
Unix	B-Application
and	O
Microsoft	B-Application
Windows	I-Application
.	O
</s>
<s>
The	O
QCAD	B-Language
GUI	B-Application
is	O
based	O
on	O
the	O
Qt	B-Language
framework	I-Language
.	O
</s>
<s>
QCAD	B-Language
is	O
partly	O
released	O
under	O
the	O
GNU	B-License
General	I-License
Public	I-License
License	I-License
.	O
</s>
<s>
Precompiled	O
packages	O
are	O
available	O
for	O
32-bit	O
and	O
64-bit	O
Linux	B-Application
platforms	O
,	O
Microsoft	B-Application
Windows	I-Application
OS	I-Application
and	O
macOS	B-Application
.	O
</s>
<s>
QCAD	B-Language
is	O
developed	O
by	O
RibbonSoft	O
.	O
</s>
<s>
Development	O
on	O
QCAD	B-Language
began	O
in	O
October	O
1999	O
,	O
starting	O
with	O
code	O
from	O
CAM	O
Expert	O
.	O
</s>
<s>
QCAD	B-Language
2	O
,	O
designed	O
to	O
"	O
make	O
QCAD	B-Language
more	O
productive	O
,	O
more	O
user	O
friendly	O
,	O
more	O
flexible	O
and	O
increase	O
its	O
compatibility	O
with	O
other	O
products	O
"	O
began	O
development	O
in	O
May	O
2002	O
.	O
</s>
<s>
QCAD	B-Language
3	O
was	O
first	O
released	O
in	O
August	O
2011	O
with	O
an	O
ECMAScript	B-Language
(	O
JavaScript	B-Language
)	O
interface	O
as	O
major	O
addition	O
.	O
</s>
<s>
Some	O
of	O
the	O
interface	O
and	O
concepts	O
behind	O
QCAD	B-Language
are	O
similar	O
to	O
those	O
of	O
AutoCAD	O
.	O
</s>
<s>
QCAD	B-Language
uses	O
the	O
DXF	O
file	O
format	O
internally	O
and	O
to	O
save	O
and	O
import	O
files	O
.	O
</s>
<s>
Starting	O
from	O
version	O
3.7	O
QCAD	B-Language
is	O
distributed	O
as	O
Professional	O
Trial	O
that	O
works	O
for	O
a	O
limited	O
time	O
,	O
or	O
as	O
Community	O
Edition	O
as	O
source	O
code	O
only	O
,	O
so	O
users	O
need	O
to	O
self	O
compile	O
or	O
remove	O
the	O
QCAD	B-Language
Professional	O
add-on	O
running	O
in	O
trial	O
mode	O
.	O
</s>
<s>
Although	O
much	O
of	O
the	O
software	O
source	O
is	O
under	O
the	O
GPL-3.0-or-later	B-License
license	O
there	O
is	O
also	O
significant	O
functionality	O
not	O
available	O
under	O
a	O
free	B-License
software	I-License
license	I-License
.	O
</s>
<s>
QCAD	B-Language
has	O
a	O
large	O
library	O
of	O
different	O
templates	O
.	O
</s>
<s>
QCAD	B-Language
operates	O
on	O
Linux	B-Application
,	O
macOS	B-Application
[	O
10.7	O
(	O
Lion	O
)	O
or	O
later ]	O
,	O
UNIX	B-Application
(	O
FreeBSD	B-Operating_System
,	O
NetBSD	B-Device
)	O
,	O
Solaris	B-Application
for	O
x86	O
and	O
SPARC	B-Architecture
,	O
and	O
Windows	B-Application
[	O
8	O
,	O
7	O
,	O
Vista	O
,	O
XP	O
,	O
2000 ]	O
.	O
</s>
