<s>
In	O
computer	B-General_Concept
programming	I-General_Concept
,	O
a	O
free-form	B-Language
language	I-Language
is	O
a	O
programming	O
language	O
in	O
which	O
the	O
positioning	O
of	O
characters	O
on	O
the	O
page	O
in	O
program	O
text	O
is	O
insignificant	O
.	O
</s>
<s>
Program	O
text	O
does	O
not	O
need	O
to	O
be	O
placed	O
in	O
specific	O
columns	O
as	O
on	O
old	O
punched	B-Architecture
card	I-Architecture
systems	O
,	O
and	O
frequently	O
ends	O
of	O
lines	O
are	O
insignificant	O
.	O
</s>
<s>
Most	O
free-form	B-Language
languages	I-Language
descend	O
from	O
ALGOL	B-Language
,	O
including	O
C	B-Language
,	O
Pascal	B-Application
,	O
and	O
Perl	B-Language
.	O
</s>
<s>
Lisp	B-Language
languages	I-Language
are	O
free-form	O
,	O
although	O
they	O
do	O
not	O
descend	O
from	O
ALGOL	B-Language
.	O
</s>
<s>
Rexx	B-Language
is	O
mostly	O
free-form	O
,	O
though	O
in	O
some	O
cases	O
whitespace	O
characters	O
are	O
concatenation	O
operators	O
.	O
</s>
<s>
SQL	B-Language
,	O
though	O
not	O
a	O
full	O
programming	O
language	O
,	O
is	O
also	O
free-form	O
.	O
</s>
<s>
Most	O
free-form	B-Language
languages	I-Language
are	O
also	O
structured	B-Language
programming	I-Language
languages	O
,	O
which	O
is	O
sometimes	O
thought	O
to	O
go	O
along	O
with	O
the	O
free-form	O
syntax	O
:	O
Earlier	O
imperative	B-Application
programming	I-Application
languages	I-Application
such	O
as	O
Fortran	O
77	O
used	O
particular	O
columns	O
for	O
line	O
numbers	O
,	O
which	O
many	O
structured	O
languages	O
do	O
not	O
use	O
or	O
need	O
.	O
</s>
<s>
Structured	O
languages	O
exist	O
which	O
are	O
not	O
free-form	O
,	O
such	O
as	O
ABC	B-Language
,	O
Curry	B-Application
,	O
Haskell	B-Language
,	O
Python	B-Language
and	O
others	O
.	O
</s>
<s>
Many	O
of	O
these	O
use	O
some	O
variant	O
of	O
the	O
off-side	B-Language
rule	I-Language
,	O
in	O
which	O
indentation	O
,	O
rather	O
than	O
keywords	O
or	O
braces	O
,	O
is	O
used	O
to	O
group	O
blocks	O
of	O
code	O
.	O
</s>
