<s>
Acornsoft	B-Language
LISP	I-Language
(	O
marketed	O
simply	O
as	O
LISP	B-Language
)	O
is	O
a	O
dialect	O
and	O
commercial	O
implementation	O
of	O
the	O
Lisp	B-Language
programming	I-Language
language	I-Language
,	O
released	O
in	O
the	O
early	O
1980s	O
for	O
the	O
8-bit	O
Acorn	B-Device
Atom	I-Device
,	O
BBC	B-Device
Micro	I-Device
and	O
Acorn	B-Device
Electron	I-Device
computers	O
.	O
</s>
<s>
Acornsoft	B-Language
LISP	I-Language
was	O
released	O
on	O
cassette	O
,	O
disk	O
and	O
ROM	O
cartridge	O
.	O
</s>
<s>
In	O
contrast	O
with	O
large-scale	O
LISP	B-Language
implementations	O
,	O
Acornsoft	O
's	O
variant	O
only	O
had	O
a	O
modest	O
number	O
of	O
built-in	O
definitions	O
as	O
it	O
had	O
to	O
fit	O
in	O
the	O
limited	O
memory	O
space	O
of	O
the	O
8-bit	O
Acorn	O
computers	O
.	O
</s>
<s>
The	O
interpreter	O
was	O
implemented	O
in	O
6502	B-General_Concept
machine-code	O
and	O
was	O
5.5K	O
in	O
size	O
.	O
</s>
<s>
It	O
was	O
based	O
on	O
Owl	O
LISP	B-Language
written	O
by	O
Mike	O
Gardner	O
of	O
Owl	O
Computers	O
,	O
which	O
he	O
published	O
for	O
the	O
Apple	O
II	O
in	O
1979	O
.	O
</s>
<s>
Acornsoft	O
licensed	O
it	O
from	O
Owl	O
Computers	O
in	O
1981	O
and	O
developed	O
it	O
for	O
the	O
Acorn	B-Device
Atom	I-Device
and	O
BBC	B-Device
Microcomputer	I-Device
.	O
</s>
<s>
The	O
supplied	O
LISP	B-Language
workspace	O
image	O
containing	O
commonly	O
used	O
built-in	O
functions	O
and	O
constants	O
was	O
3K	O
in	O
size	O
,	O
although	O
this	O
could	O
be	O
deleted	O
if	O
not	O
needed	O
by	O
the	O
user	O
to	O
free	O
up	O
more	O
memory	O
.	O
</s>
<s>
Acornsoft	O
also	O
commissioned	O
a	O
book	O
"	O
LISP	B-Language
on	O
the	O
BBC	B-Device
Microcomputer	I-Device
"	O
,	O
by	O
Arthur	O
Norman	O
and	O
Gillian	O
Cattell	O
,	O
published	O
in	O
1983	O
.	O
</s>
<s>
Arthur	O
Norman	O
was	O
a	O
lecturer	O
in	O
computer	O
science	O
at	O
Cambridge	O
University	O
,	O
and	O
Gillian	O
Cattell	O
did	O
research	O
into	O
LISP	B-Language
at	O
Cambridge	O
.	O
</s>
<s>
Acornsoft	B-Language
LISP	I-Language
was	O
reportedly	O
the	O
basis	O
for	O
MetaComCo	B-Device
's	I-Device
QL	O
Lisp	B-Language
product	O
,	O
with	O
Arthur	O
Norman	O
and	O
John	O
Fitch	O
being	O
credited	O
as	O
authors	O
.	O
</s>
<s>
As	O
a	O
reference	O
,	O
the	O
Acornsoft	O
book	O
by	O
Norman	O
and	O
Cattell	O
was	O
recommended	O
for	O
use	O
with	O
the	O
MetaComCo	B-Device
product	O
.	O
</s>
