<s>
Mary	B-Language
is	O
a	O
programming	O
language	O
designed	O
and	O
implemented	O
by	O
RUNIT	O
at	O
Trondheim	O
,	O
Norway	O
in	O
the	O
1970s	O
.	O
</s>
<s>
It	O
borrowed	O
many	O
features	O
from	O
ALGOL	B-Language
68	I-Language
but	O
was	O
designed	O
for	O
systems	B-Application
programming	I-Application
(	O
machine-oriented	O
programming	O
)	O
.	O
</s>
<s>
Similar	O
to	O
C	B-Language
,	O
several	O
language	O
features	O
appear	O
to	O
have	O
existed	O
to	O
allow	O
producing	O
reasonably	O
well	O
optimised	O
code	O
,	O
despite	O
a	O
quite	O
primitive	O
code	O
generator	O
in	O
the	O
compiler	O
.	O
</s>
<s>
These	O
included	O
operators	O
similar	O
to	O
the	O
+	O
=	O
et	O
alter	O
in	O
C	B-Language
and	O
explicit	O
register	B-General_Concept
declarations	O
for	O
variables	O
.	O
</s>
<s>
A	O
book	O
describing	O
Mary	B-Language
was	O
printed	O
in	O
1974	O
(	O
Fourth	O
and	O
last	O
edition	O
in	O
1979	O
)	O
:	O
Mary	B-Language
Textbook	O
by	O
Reidar	O
Conradi	O
&	O
Per	O
Holager	O
.	O
</s>
<s>
The	O
original	O
Mary	B-Language
compiler	O
was	O
written	O
in	O
NU	O
ALGOL	B-Language
,	O
ran	O
on	O
the	O
Univac-1100	O
series	O
and	O
was	O
used	O
to	O
bootstrap	O
a	O
native	O
compiler	O
for	O
ND-100/Sintran	O
-III	O
.	O
</s>
<s>
RUNIT	O
implemented	O
a	O
CHILL	B-Language
compiler	O
written	O
in	O
Mary	B-Language
which	O
ran	O
on	O
ND-100	O
and	O
had	O
Intel	B-General_Concept
8086	I-General_Concept
and	O
80286	B-General_Concept
targets	O
.	O
</s>
<s>
When	O
this	O
compiler	O
was	O
ported	O
to	O
the	O
VAX	B-Device
platform	O
,	O
a	O
common	O
backend	O
for	O
Mary	B-Language
and	O
CHILL	B-Language
was	O
implemented	O
.	O
</s>
<s>
Later	O
,	O
backends	O
for	O
i386	B-General_Concept
and	O
SPARC	B-Architecture
were	O
available	O
.	O
</s>
<s>
Since	O
the	O
Mary	B-Language
compiler	O
was	O
implemented	O
in	O
Mary	B-Language
,	O
it	O
was	O
possible	O
to	O
run	O
the	O
compiler	O
on	O
all	O
these	O
platforms	O
.	O
</s>
<s>
Mary	B-Language
is	O
no	O
longer	O
maintained	O
.	O
</s>
