<s>
APT	B-Language
(	O
Automatically	B-Language
Programmed	I-Language
Tool	I-Language
)	O
is	O
a	O
high-level	O
computer	O
programming	O
language	O
most	O
commonly	O
used	O
to	O
generate	O
instructions	O
for	O
numerically	O
controlled	O
machine	O
tools	O
.	O
</s>
<s>
Douglas	O
T	O
.	O
Ross	O
is	O
considered	O
by	O
many	O
to	O
be	O
the	O
father	O
of	O
APT	B-Language
:	O
as	O
head	O
of	O
the	O
newly	O
created	O
Computer	O
Applications	O
Group	O
of	O
the	O
Servomechanisms	O
Laboratory	O
at	O
MIT	O
in	O
1956	O
,	O
he	O
led	O
its	O
technical	O
effort	O
.	O
</s>
<s>
APT	B-Language
is	O
a	O
language	O
and	O
system	O
that	O
alleviates	O
the	O
tedious	O
mathematics	O
of	O
writing	O
toolpaths	O
for	O
numerically	O
controlled	O
equipment	O
.	O
</s>
<s>
Derivatives	O
of	O
APT	B-Language
were	O
later	O
developed	O
.	O
</s>
<s>
APT	B-Language
is	O
used	O
to	O
program	O
numerically-controlled	O
machine	O
tools	O
to	O
create	O
complex	O
parts	O
using	O
a	O
cutting	O
tool	O
moving	O
in	O
space	O
.	O
</s>
<s>
APT	B-Language
is	O
a	O
special-purpose	O
language	O
and	O
the	O
predecessor	O
to	O
modern	O
computer	O
aided	O
manufacturing	O
(	O
CAM	O
)	O
systems	O
.	O
</s>
<s>
APT	B-Language
also	O
was	O
US	O
Air	O
Force	O
sponsored	O
and	O
is	O
notable	O
for	O
being	O
the	O
world	O
's	O
first	O
major	O
cooperative	O
programming	O
venture	O
,	O
combining	O
government	O
agencies	O
,	O
universities	O
,	O
and	O
a	O
14-company	O
team	O
organized	O
within	O
the	O
Aircraft	O
Industries	O
Association	O
(	O
now	O
Aerospace	O
Industries	O
Association	O
)	O
.	O
</s>
<s>
APT	B-Language
was	O
created	O
before	O
graphical	B-Application
user	I-Application
interfaces	I-Application
were	O
available	O
,	O
and	O
so	O
it	O
relies	O
on	O
text	O
to	O
specify	O
the	O
geometry	O
and	O
toolpaths	O
needed	O
to	O
machine	O
a	O
part	O
.	O
</s>
<s>
The	O
original	O
version	O
was	O
created	O
before	O
even	O
FORTRAN	B-Application
was	O
available	O
and	O
was	O
the	O
very	O
first	O
ANSI	O
standard	O
.	O
</s>
<s>
Later	O
versions	O
were	O
rewritten	O
in	O
FORTRAN	B-Application
.	O
</s>
<s>
APT	B-Language
shares	O
many	O
similarities	O
with	O
other	O
computer	O
programming	O
languages	O
such	O
as	O
FORTRAN	B-Application
.	O
</s>
<s>
APT	B-Language
converts	O
source	O
statements	O
into	O
programs	O
for	O
driving	O
numerically-controlled	O
machine	O
tools	O
.	O
</s>
<s>
The	O
output	O
from	O
an	O
APT	B-Language
processor	O
may	O
be	O
a	O
cutter	O
location	O
(	O
CL	O
)	O
file	O
which	O
is	O
then	O
run	O
through	O
a	O
post-processor	O
specific	O
to	O
the	O
desired	O
control	O
-	O
machine	O
pair	O
.	O
</s>
<s>
Further	O
derivatives	O
of	O
APT	B-Language
were	O
developed	O
,	O
initially	O
mainly	O
to	O
allow	O
the	O
programs	O
to	O
run	O
on	O
minicomputers	O
instead	O
of	O
mainframes	O
.	O
</s>
<s>
These	O
included	O
ADAPT	O
from	O
IBM	O
;	O
EXAPT	B-Algorithm
from	O
Germany	O
;	O
and	O
UNIAPT	O
,	O
initially	O
from	O
United	O
Computing	O
,	O
later	O
used	O
alongside	O
the	O
Unigraphics	B-Algorithm
CADCAM	O
systems	O
.	O
</s>
<s>
Machine	O
tool	O
manufacturer	O
's	O
systems	O
utilize	O
elements	O
of	O
APT	B-Language
to	O
this	O
day	O
.	O
</s>
<s>
Standards	O
Developers	O
like	O
STEP-NC	O
took	O
toolpath	O
curves	O
from	O
APT	B-Language
and	O
other	O
sources	O
.	O
</s>
<s>
APT	B-Language
formed	O
the	O
basis	O
for	O
two	O
early	O
programming	O
languages	O
in	O
robotics	O
:	O
RAPT	O
(	O
Robot	O
APT	B-Language
)	O
was	O
developed	O
at	O
the	O
University	O
of	O
Edinburgh	O
School	O
of	O
Informatics	O
,	O
and	O
ROBEX	O
was	O
a	O
derivative	O
of	O
EXAPT	B-Algorithm
.	O
</s>
