<s>
Grammatik	B-Application
was	O
the	O
first	O
grammar	B-Application
checking	I-Application
program	O
developed	O
for	O
home	O
computer	O
systems	O
.	O
</s>
<s>
It	O
was	O
first	O
released	O
no	O
later	O
than	O
1981	O
,	O
and	O
was	O
inspired	O
by	O
the	O
Writer	B-Device
's	I-Device
Workbench	I-Device
.	O
</s>
<s>
Grammatik	B-Application
was	O
first	O
available	O
for	O
a	O
Radio	O
Shack	O
-	O
TRS-80	B-Device
,	O
and	O
soon	O
had	O
versions	O
for	O
CP/M	B-Application
and	O
the	O
IBM	B-Device
PC	I-Device
.	O
</s>
<s>
Reference	O
Software	O
of	O
San	O
Francisco	O
,	O
California	O
,	O
acquired	O
Grammatik	B-Application
in	O
1985	O
.	O
</s>
<s>
Development	O
of	O
Grammatik	B-Application
continued	O
,	O
and	O
it	O
became	O
an	O
actual	O
grammar	B-Application
checker	I-Application
that	O
could	O
detect	O
writing	O
errors	O
beyond	O
simple	O
style	O
checking	O
.	O
</s>
<s>
Subsequent	O
versions	O
were	O
released	O
for	O
the	O
MS-DOS	B-Application
,	O
Windows	O
,	O
Macintosh	B-Device
and	O
Unix	B-Application
platforms	O
.	O
</s>
<s>
Grammatik	B-Application
was	O
ultimately	O
acquired	O
by	O
WordPerfect	B-Application
Corporation	I-Application
and	O
is	O
integrated	O
in	O
the	O
WordPerfect	B-Application
word	B-General_Concept
processor	I-General_Concept
.	O
</s>
