<s>
Non-structured	B-Application
programming	I-Application
is	O
the	O
historically	O
earliest	O
programming	O
paradigm	O
capable	O
of	O
creating	O
Turing-complete	O
algorithms	O
.	O
</s>
<s>
It	O
is	O
often	O
contrasted	O
with	O
the	O
structured	B-Language
programming	I-Language
paradigm	O
,	O
in	O
particular	O
with	O
the	O
use	O
of	O
unstructured	O
control	O
flow	O
using	O
goto	B-Application
statements	O
or	O
equivalent	O
.	O
</s>
<s>
The	O
distinction	O
was	O
particularly	O
stressed	O
by	O
the	O
publication	O
of	O
the	O
influential	O
"	O
Go	O
To	O
Statement	O
Considered	O
Harmful	O
"	O
open	O
letter	O
in	O
1968	O
by	O
Dutch	O
computer	O
scientist	O
Edsger	O
W	O
.	O
Dijkstra	O
,	O
who	O
coined	O
the	O
term	O
"	O
structured	B-Language
programming	I-Language
"	O
.	O
</s>
<s>
Unstructured	B-Application
programming	I-Application
has	O
been	O
heavily	O
criticized	O
for	O
producing	O
hardly	O
readable	O
(	O
"	O
spaghetti	O
"	O
)	O
code	O
.	O
</s>
<s>
There	O
are	O
both	O
high	O
-	O
and	O
low-level	O
programming	O
languages	O
that	O
use	O
non-structured	B-Application
programming	I-Application
.	O
</s>
<s>
Some	O
languages	O
commonly	O
cited	O
as	O
being	O
non-structured	O
include	O
JOSS	B-Language
,	O
FOCAL	B-Language
,	O
TELCOMP	B-Language
,	O
assembly	B-Language
languages	I-Language
,	O
MS-DOS	B-Application
batch	O
files	O
,	O
and	O
early	O
versions	O
of	O
BASIC	O
,	O
Fortran	B-Application
,	O
COBOL	B-Application
,	O
and	O
MUMPS	B-Language
.	O
</s>
<s>
This	O
is	O
in	O
contrast	O
to	O
structured	B-Language
programming	I-Language
which	O
uses	O
sequential	O
constructs	O
of	O
statements	O
,	O
selection	O
(	O
if/then/else	O
)	O
and	O
repetition	O
(	O
while	O
and	O
for	O
)	O
.	O
</s>
