<s>
PAL	B-Language
,	O
the	O
Pedagogic	B-Language
Algorithmic	I-Language
Language	I-Language
,	O
is	O
a	O
programming	O
language	O
developed	O
at	O
the	O
Massachusetts	O
Institute	O
of	O
Technology	O
in	O
around	O
1967	O
to	O
help	O
teach	O
programming	O
language	O
semantics	O
and	O
design	O
.	O
</s>
<s>
It	O
is	O
a	O
"	O
direct	O
descendant	O
"	O
of	O
ISWIM	B-Language
and	O
owes	O
much	O
of	O
its	O
philosophy	O
to	O
Christopher	O
Strachey	O
.	O
</s>
<s>
The	O
initial	O
implementation	O
of	O
PAL	B-Language
,	O
in	O
Lisp	O
,	O
was	O
written	O
by	O
Peter	O
Landin	O
and	O
James	O
H	O
.	O
Morris	O
,	O
Jr.	O
</s>
<s>
It	O
was	O
implemented	O
by	O
Richards	O
and	O
Barkalow	O
in	O
BCPL	B-Language
as	O
an	O
intermediate-code	O
interpreter	O
and	O
ran	O
on	O
the	O
IBM	B-Application
System/360	I-Application
;	O
this	O
was	O
called	O
PAL/360	O
.	O
</s>
<s>
RPAL	B-Language
,	O
the	O
Right-reference	O
Pedagogic	B-Language
Algorithmic	I-Language
Language	I-Language
,	O
is	O
a	O
functional	O
subset	O
of	O
PAL	B-Language
with	O
an	O
implementation	O
on	O
SourceForge	B-Application
.	O
</s>
<s>
It	O
is	O
used	O
at	O
the	O
University	O
of	O
Florida	O
to	O
teach	O
the	O
construction	O
of	O
programming	O
languages	O
and	O
functional	B-Language
programming	I-Language
.	O
</s>
