<s>
The	O
Prototype	B-Application
Verification	I-Application
System	I-Application
(	O
PVS	O
)	O
is	O
a	O
specification	B-Application
language	I-Application
integrated	O
with	O
support	O
tools	O
and	O
an	O
automated	B-Application
theorem	I-Application
prover	I-Application
,	O
developed	O
at	O
the	O
Computer	O
Science	O
Laboratory	O
of	O
SRI	O
International	O
in	O
Menlo	O
Park	O
,	O
California	O
.	O
</s>
<s>
The	O
system	O
is	O
implemented	O
in	O
Common	B-Language
Lisp	I-Language
,	O
and	O
is	O
released	O
under	O
the	O
GNU	B-License
General	I-License
Public	I-License
License	I-License
(	O
GPL	B-License
)	O
.	O
</s>
