<s>
"	O
MLisp	B-Language
"	O
is	O
also	O
another	O
name	O
for	O
Mocklisp	B-Language
,	O
a	O
stripped-down	O
version	O
of	O
Lisp	B-Language
used	O
as	O
an	O
extension	O
language	O
in	O
Gosling	B-Operating_System
Emacs	I-Operating_System
.	O
</s>
<s>
MLISP	B-Language
is	O
a	O
variant	O
of	O
Lisp	B-Language
with	O
an	O
Algol-like	B-Language
syntax	O
based	O
on	O
M-Expressions	B-Language
,	O
which	O
were	O
the	O
function	O
syntax	O
in	O
the	O
original	O
description	O
of	O
Lisp	B-Language
by	O
John	O
McCarthy	O
.	O
</s>
<s>
McCarthy	O
's	O
M-expressions	B-Language
were	O
never	O
implemented	O
in	O
an	O
exact	O
form	O
.	O
</s>
<s>
MLISP	B-Language
was	O
first	O
implemented	O
for	O
the	O
IBM	B-Application
360	I-Application
by	O
Horace	O
Enea	O
and	O
then	O
reimplemented	O
for	O
the	O
PDP	B-Device
10	I-Device
by	O
David	O
Canfield	O
Smith	O
.	O
</s>
<s>
This	O
second	O
implementation	O
also	O
supported	O
a	O
special	O
kind	O
of	O
lambdas	O
(	O
"	O
FEXPR	B-Language
"	O
)	O
,	O
which	O
do	O
not	O
evaluate	O
their	O
arguments	O
.	O
</s>
<s>
As	O
in	O
Lisp-1	B-Language
or	O
Scheme	B-Language
,	O
there	O
was	O
a	O
single	O
namespace	O
for	O
variables	O
and	O
functions	O
.	O
</s>
<s>
While	O
MLISP	B-Language
was	O
just	O
a	O
preprocessor	O
with	O
an	O
alternative	O
,	O
more	O
reader-friendly	O
syntax	O
for	O
Lisp	B-Language
,	O
the	O
descendant	O
MLISP	B-Language
2	O
introduced	O
new	O
concepts	O
:	O
</s>
<s>
Larry	O
Tesler	O
improved	O
the	O
pattern	B-Language
matching	I-Language
system	O
to	O
implement	O
a	O
successor	O
language	O
called	O
LISP70	O
,	O
which	O
was	O
only	O
completed	O
to	O
a	O
preliminary	O
version	O
.	O
</s>
<s>
Though	O
this	O
path	O
of	O
LISP	B-Language
evolution	O
is	O
widely	O
neglected	O
,	O
it	O
resembles	O
some	O
features	O
,	O
later	O
found	O
in	O
ML	B-Language
or	O
Scheme	B-Language
.	O
</s>
<s>
M-LISP	O
(	O
MetaLISP	O
)	O
by	O
Robert	O
Muller	O
is	O
an	O
unrelated	O
language	O
from	O
1989	O
–	O
1992	O
.	O
</s>
<s>
It	O
was	O
"	O
a	O
hybrid	O
of	O
M-expression	B-Language
LISP	B-Language
and	O
Scheme	B-Language
"	O
.	O
</s>
