<s>
TabWorks	B-Application
is	O
a	O
replacement	B-Application
shell	I-Application
for	O
Windows	O
3.x	O
and	O
Windows	B-Application
95	I-Application
developed	O
by	O
XSoft	O
,	O
a	O
division	O
of	O
Xerox	O
PARC	O
.	O
</s>
<s>
The	O
software	O
was	O
created	O
to	O
replace	O
Program	O
Manager	O
on	O
Windows	O
3.x	O
and	O
the	O
shell	O
on	O
Windows	B-Application
95	I-Application
.	O
</s>
<s>
TabWorks	B-Application
was	O
shipped	O
in	O
1993	O
and	O
distributed	O
with	O
PCs	O
from	O
1993	O
to	O
around	O
1997	O
by	O
several	O
companies	O
,	O
including	O
Compaq	O
and	O
NEC	O
.	O
</s>
<s>
"	O
Since	O
the	O
release	O
of	O
Windows	B-Application
95	I-Application
,	O
Microsoft	O
has	O
become	O
aware	O
of	O
instances	O
in	O
which	O
OEMs	O
are	O
modifying	O
the	O
product	O
as	O
a	O
method	O
of	O
differentiating	O
their	O
hardware	O
.	O
</s>
<s>
Compaq	O
stopped	O
bundling	O
TabWorks	B-Application
with	O
its	O
machines	O
in	O
1996	O
,	O
claiming	O
it	O
was	O
no	O
longer	O
necessary	O
given	O
the	O
improvements	O
to	O
the	O
shell	O
in	O
Windows	B-Application
95	I-Application
.	O
</s>
<s>
TabWorks	B-Application
was	O
later	O
acquired	O
in	O
1996	O
by	O
Citadel	O
Computer	O
systems	O
,	O
which	O
integrated	O
it	O
into	O
their	O
line	O
of	O
network	O
security	O
and	O
desktop	O
utility	O
product	O
lines	O
.	O
</s>
<s>
Citadel	O
discontinued	O
selling	O
TabWorks	B-Application
in	O
early	O
2001	O
.	O
</s>
