<s>
CBASIC	O
is	O
a	O
compiled	B-Language
version	O
of	O
the	O
BASIC	O
programming	O
language	O
written	O
for	O
the	O
CP/M	B-Application
operating	I-Application
system	I-Application
by	O
Gordon	O
Eubanks	O
in	O
1976	O
–	O
1977	O
.	O
</s>
<s>
It	O
is	O
an	O
enhanced	O
version	O
of	O
BASIC-E	B-Application
.	O
</s>
<s>
BASIC-E	B-Application
was	O
Eubank	O
's	O
master	O
's	O
thesis	O
project	O
.	O
</s>
<s>
It	O
was	O
developed	O
in	O
PL/M	B-Language
by	O
Eubanks	O
for	O
Gary	O
Kildall	O
's	O
new	O
CP/M	B-Application
operating	I-Application
system	I-Application
while	O
both	O
men	O
were	O
at	O
the	O
Naval	O
Postgraduate	O
School	O
in	O
Monterey	O
,	O
California	O
.	O
</s>
<s>
BASIC-E	B-Application
was	O
based	O
on	O
a	O
BASIC	O
compiler	B-Language
originally	O
written	O
by	O
Gary	O
Kildall	O
in	O
1974	O
.	O
</s>
<s>
Because	O
it	O
was	O
developed	O
at	O
public	O
expense	O
,	O
BASIC-E	B-Application
is	O
in	O
the	O
public	O
domain	O
and	O
could	O
not	O
be	O
marketed	O
exclusively	O
.	O
</s>
<s>
Seymour	O
Rubinstein	O
,	O
the	O
marketing	O
director	O
of	O
IMSAI	O
contacted	O
Eubanks	O
and	O
asked	O
him	O
to	O
create	O
a	O
saleable	O
version	O
under	O
contract	O
for	O
the	O
IMSAI	B-Device
8080	I-Device
microcomputer	B-Architecture
.	O
</s>
<s>
He	O
retained	O
joint	O
ownership	O
of	O
the	O
program	O
with	O
IMSAI	O
,	O
and	O
sold	O
the	O
program	O
through	O
his	O
own	O
company	O
,	O
Compiler	B-Language
Systems	O
,	O
until	O
it	O
was	O
acquired	O
by	O
Digital	O
Research	O
in	O
1981	O
.	O
</s>
<s>
CRUN	O
VER	O
2.38	O
/	O
COPYRIGHT	O
1981	O
COMPILER	B-Language
SYSTEMS	O
INC	O
.	O
</s>
<s>
BASIC-E	B-Application
and	O
early	O
versions	O
of	O
CBASIC	O
compiled	B-Language
source	O
code	O
into	O
an	O
intermediate	O
p-code	B-Language
file	O
,	O
which	O
was	O
then	O
executed	O
by	O
a	O
separate	O
run-time	B-Device
interpreter	O
program	O
.	O
</s>
<s>
CBASIC	O
proved	O
very	O
popular	O
because	O
it	O
incorporated	O
14-digit	O
binary-coded	O
decimal	O
(	O
BCD	O
)	O
math	O
which	O
eliminated	O
MBASIC	B-Language
's	O
rounding	O
errors	O
that	O
were	O
sometimes	O
troublesome	O
for	O
accounting	O
.	O
</s>
<s>
InfoWorld	O
in	O
1980	O
described	O
CBASIC	O
as	O
the	O
"	O
primary	O
language	O
for	O
the	O
development	O
of	O
commercial	O
CP/M	B-Application
applications	O
"	O
,	O
because	O
of	O
developers	O
 '	O
widespread	O
familiarity	O
with	O
BASIC	O
and	O
ability	O
to	O
distribute	O
royalty-free	O
binaries	O
without	O
source	O
code	O
to	O
CBASIC	O
owners	O
.	O
</s>
<s>
The	O
magazine	O
stated	O
that	O
the	O
language	O
had	O
become	O
popular	O
"	O
despite	O
serious	O
drawbacks	O
"	O
,	O
including	O
the	O
required	O
preprocessor	B-General_Concept
for	O
interpreted	O
source	O
code	O
making	O
debugging	O
difficult	O
,	O
slow	O
speed	O
,	O
and	O
incompatible	O
changes	O
.	O
</s>
