<s>
Microsoft	B-Language
Pascal	I-Language
is	O
a	O
discontinued	O
implementation	O
of	O
the	O
Pascal	B-Application
programming	I-Application
language	I-Application
developed	O
by	O
the	O
Microsoft	O
Corporation	O
for	O
compiling	B-Language
programs	O
for	O
running	O
on	O
its	O
MS-DOS	B-Application
and	O
Xenix	B-Application
operating	I-Application
systems	I-Application
and	O
,	O
in	O
later	O
versions	O
,	O
on	O
OS/2	B-Application
(	O
like	O
many	O
other	O
Microsoft	O
programming	O
tools	O
,	O
albeit	O
they	O
are	O
only	O
capable	O
of	O
generating	O
16-bit	O
programs	O
for	O
the	O
latter	O
)	O
.	O
</s>
<s>
Microsoft	B-Language
Pascal	I-Language
version	O
1.0	O
was	O
released	O
in	O
1980	O
.	O
</s>
<s>
The	O
last	O
version	O
of	O
Microsoft	B-Language
Pascal	I-Language
to	O
be	O
released	O
was	O
version	O
4.0	O
in	O
1988	O
,	O
when	O
Microsoft	B-Language
Pascal	I-Language
was	O
superseded	O
by	O
Microsoft	O
QuickPascal	B-Language
,	O
a	O
cheaper	O
development	O
tool	O
that	O
Microsoft	O
produced	O
in	O
order	O
to	O
compete	O
with	O
Borland	O
's	O
Turbo	B-Application
Pascal	I-Application
.	O
</s>
<s>
Microsoft	B-Language
Pascal	I-Language
was	O
priced	O
at	O
,	O
whereas	O
QuickPascal	B-Language
was	O
priced	O
between	O
,	O
and	O
the	O
differences	O
between	O
the	O
two	O
were	O
similar	O
to	O
those	O
between	O
Microsoft	B-Language
BASIC	I-Language
Professional	I-Language
Development	I-Language
System	I-Language
and	O
Microsoft	B-Language
QuickBASIC	I-Language
.	O
</s>
<s>
Unlike	O
the	O
ISO	O
compliant	O
Microsoft	B-Language
Pascal	I-Language
product	O
,	O
QuickPascal	B-Language
went	O
after	O
the	O
ultimate	O
compatibility	O
with	O
Turbo	B-Application
Pascal	I-Application
.	O
</s>
<s>
This	O
included	O
not	O
only	O
source-level	O
compatibility	O
,	O
but	O
rather	O
complete	O
binary	O
compatibility	O
with	O
widely	O
available	O
unit	O
libraries	O
for	O
the	O
competitor	O
's	O
compiler	B-Language
.	O
</s>
<s>
To	O
achieve	O
this	O
level	O
of	O
compatibility	O
,	O
QuickPascal	B-Language
moved	O
away	O
from	O
the	O
common	O
file	O
format	O
(	O
OBJ	O
)	O
and	O
tool	O
set	O
(	O
LINK	O
,	O
LIB	O
)	O
shared	O
by	O
Microsoft	O
's	O
other	O
compilers	B-Language
.	O
</s>
