<s>
Macintosh	B-Language
Basic	I-Language
,	O
or	O
MacBASIC	B-Language
,	O
was	O
both	O
a	O
comprehensive	O
programming	O
language	O
and	O
a	O
fully	O
interactive	O
development	O
environment	O
designed	O
by	O
Apple	O
Computer	O
for	O
the	O
original	B-Device
Macintosh	I-Device
computer	O
.	O
</s>
<s>
It	O
was	O
developed	O
by	O
original	B-Device
Macintosh	I-Device
team	O
member	O
Donn	O
Denman	O
,	O
with	O
help	O
from	O
fellow	O
Apple	O
programmers	O
Marianne	O
Hsiung	O
,	O
Larry	O
Kenyon	O
,	O
and	O
Bryan	O
Stearns	O
,	O
as	O
part	O
of	O
the	O
original	B-Device
Macintosh	I-Device
development	O
effort	O
starting	O
in	O
late	O
1981	O
.	O
</s>
<s>
We	O
decided	O
we	O
should	O
write	O
it	O
ourselves	O
,	O
instead	O
of	O
relying	O
on	O
a	O
third	O
party	O
,	O
because	O
it	O
was	O
important	O
for	O
the	O
BASIC	O
programs	O
to	O
be	O
able	O
to	O
take	O
advantage	O
of	O
the	O
Macintosh	B-Device
UI	B-Application
,	O
and	O
we	O
did	O
n't	O
trust	O
a	O
third	O
party	O
to	O
'	O
get	O
it	O
 '	O
enough	O
to	O
do	O
it	O
right.	O
"	O
</s>
<s>
MacBASIC	B-Language
was	O
released	O
as	O
beta	O
software	O
in	O
1985	O
,	O
and	O
was	O
adopted	O
for	O
use	O
in	O
places	O
such	O
as	O
the	O
Dartmouth	O
College	O
computer	O
science	O
department	O
,	O
for	O
use	O
in	O
an	O
introductory	O
programming	O
course	O
.	O
</s>
<s>
In	O
November	O
1985	O
,	O
Apple	O
abruptly	O
ended	O
the	O
project	O
as	O
part	O
of	O
a	O
deal	O
with	O
Microsoft	O
to	O
extend	O
the	O
license	O
for	O
BASIC	O
on	O
the	O
Apple	B-Device
II	I-Device
.	O
</s>
<s>
Although	O
Apple	O
retracted	O
MacBASIC	B-Language
,	O
unlicensed	O
copies	O
of	O
the	O
software	O
and	O
manual	O
still	O
circulated	O
,	O
but	O
because	O
MacBASIC	B-Language
was	O
no	O
longer	O
supported	O
by	O
Apple	O
and	O
was	O
not	O
designed	O
to	O
be	O
32-bit-clean	O
,	O
interest	O
eventually	O
died	O
out	O
.	O
</s>
<s>
Benchmarks	O
published	O
in	O
the	O
April	O
1984	O
issue	O
of	O
BYTE	O
magazine	O
suggested	O
that	O
MacBASIC	B-Language
had	O
better	O
performance	O
as	O
compared	O
to	O
Microsoft	O
's	O
MS	B-Language
BASIC	I-Language
for	I-Language
Macintosh	I-Language
.	O
</s>
<s>
The	O
language	O
included	O
modern	O
looping	O
control	O
structures	O
,	O
user-defined	O
functions	O
,	O
graphics	O
,	O
and	O
access	O
to	O
the	O
Macintosh	B-Device
Toolbox	I-Device
.	O
</s>
