<s>
swm	B-Device
(	O
the	O
Solbourne	O
window	B-Application
manager	I-Application
)	O
is	O
an	O
X	B-Operating_System
Window	I-Operating_System
System	I-Operating_System
window	B-Application
manager	I-Application
developed	O
by	O
Tom	O
LaStrange	O
at	O
Solbourne	O
Computer	O
in	O
1990	O
.	O
</s>
<s>
The	O
most	O
important	O
innovation	O
of	O
swm	B-Device
was	O
the	O
introduction	O
of	O
the	O
virtual	B-Application
desktop	I-Application
.	O
</s>
<s>
It	O
also	O
introduced	O
a	O
primitive	O
form	O
of	O
session	O
management	O
(	O
restoring	O
programs	O
in	O
use	O
at	O
the	O
time	O
of	O
shutdown	O
)	O
to	O
X	B-Operating_System
.	O
</s>
