<s>
Level	B-Language
I	I-Language
BASIC	I-Language
is	O
a	O
dialect	O
of	O
the	O
BASIC	B-Language
programming	I-Language
language	I-Language
that	O
shipped	O
with	O
the	O
first	O
TRS-80	B-Device
,	O
the	O
TRS-80	B-Device
Model	I-Device
I	I-Device
.	O
</s>
<s>
Unable	O
to	O
take	O
that	O
source	O
code	O
with	O
him	O
,	O
he	O
initially	O
hired	O
a	O
consultant	O
to	O
write	O
an	O
interpreter	B-Application
.	O
</s>
<s>
When	O
that	O
contractor	O
failed	O
to	O
deliver	O
,	O
he	O
adapted	O
Li-Chen	O
Wang	O
's	O
public	O
domain	O
version	O
of	O
Tiny	B-Language
BASIC	I-Language
for	O
the	O
original	O
prototype	O
of	O
the	O
TRS-80	B-Device
Model	I-Device
I	I-Device
.	O
</s>
<s>
This	O
required	O
only	O
2KB	O
of	O
memory	O
for	O
the	O
interpreter	B-Application
,	O
leaving	O
an	O
average	O
of	O
another	O
2KB	O
free	O
for	O
user	O
programs	O
in	O
common	O
4KB	O
memory	O
layouts	O
of	O
early	O
machines	O
.	O
</s>
<s>
This	O
was	O
because	O
Tiny	B-Language
BASIC	I-Language
used	O
2-byte	O
signed	O
integers	O
with	O
a	O
maximum	O
value	O
of	O
32,767	O
.	O
</s>
<s>
The	O
result	O
was	O
a	O
request	O
for	O
floating-point	B-Algorithm
math	I-Algorithm
for	O
the	O
production	O
version	O
.	O
</s>
<s>
This	O
led	O
to	O
the	O
replacement	O
of	O
the	O
existing	O
16-bit	O
integer	O
code	O
with	O
a	O
version	O
using	O
32-bit	O
single-precision	O
floating-point	B-Algorithm
numbers	I-Algorithm
.	O
</s>
<s>
The	O
language	O
fit	O
within	O
4KB	O
of	O
ROM	B-Device
.	O
</s>
<s>
In	O
a	O
presentation	O
announcing	O
the	O
TRS-80	B-Device
,	O
Leininger	O
said	O
,	O
"	O
What	O
we	O
did	O
,	O
we	O
went	O
back	O
through	O
the	O
Wang	O
Basic	O
and	O
completely	O
tore	O
out	O
about	O
60	O
per	O
cent	O
of	O
it	O
,	O
the	O
integer	O
overhead	O
and	O
all	O
that	O
kind	O
of	O
stuff.	O
"	O
</s>
<s>
When	O
the	O
TRS-80	B-Device
was	O
introduced	O
,	O
three	O
versions	O
of	O
BASIC	O
were	O
announced	O
:	O
</s>
<s>
The	O
Level	O
I	O
language	O
was	O
not	O
available	O
for	O
the	O
TRS-80	B-Device
Model	O
II	O
but	O
briefly	O
re-surfaced	O
as	O
the	O
baseline	O
package	O
for	O
the	O
TRS-80	B-Device
Model	O
III	O
in	O
1981	O
,	O
selling	O
for	O
$699	O
compared	O
to	O
the	O
$999	O
system	O
with	O
Model	O
III	O
BASIC	O
(	O
another	O
Microsoft	O
product	O
)	O
.	O
</s>
<s>
Level	B-Language
I	I-Language
BASIC	I-Language
supported	O
the	O
following	O
keywords	O
:	O
</s>
<s>
Like	O
Palo	O
Alto	O
Tiny	B-Language
BASIC	I-Language
on	O
which	O
it	O
was	O
based	O
,	O
Level	B-Language
I	I-Language
BASIC	I-Language
did	O
not	O
tokenize	O
keywords	O
like	O
Microsoft	B-Language
BASIC	I-Language
but	O
used	O
abbreviations	O
to	O
reduce	O
the	O
amount	O
of	O
memory	O
used	O
by	O
keywords	O
,	O
such	O
as	O
F	O
.	O
for	O
FOR	O
,	O
G	O
.	O
for	O
GOTO	O
,	O
P	O
.	O
for	O
PRINT	O
,	O
and	O
T	O
.	O
for	O
THEN	O
.	O
</s>
