<s>
Cosign	B-General_Concept
is	O
an	O
open-source	B-Application
project	O
originally	O
designed	O
by	O
the	O
Research	O
Systems	O
Unix	O
Group	O
to	O
provide	O
the	O
University	O
of	O
Michigan	O
with	O
a	O
secure	O
single	O
sign-on	O
web	O
authentication	O
system	O
.	O
</s>
<s>
Cosign	B-General_Concept
authenticates	O
a	O
user	O
on	O
the	O
web	O
server	O
and	O
then	O
provides	O
an	O
environment	O
variable	O
for	O
the	O
user	O
's	O
name	O
.	O
</s>
<s>
Cosign	B-General_Concept
is	O
part	O
of	O
the	O
National	O
Science	O
Foundation	O
Middleware	O
Initiative	O
(	O
NMI	O
)	O
EDIT	O
software	O
release	O
.	O
</s>
