<s>
CCVS	B-Library
,	O
or	O
Credit	O
Card	O
Verification	O
System	O
,	O
was	O
a	O
credit	O
card	O
processing	O
system	O
designed	O
for	O
Posix-based	O
operating	O
systems	O
,	O
including	O
Unix	B-Application
,	O
Linux	B-Application
,	O
and	O
a	O
version	O
for	O
Palm	B-Operating_System
OS	I-Operating_System
shown	O
at	O
trade	O
shows	O
.	O
</s>
<s>
In	O
2002	O
,	O
Red	O
Hat	O
decided	O
to	O
exit	O
the	O
eCommerce	O
market	O
as	O
an	O
ISV	B-Application
,	O
discontinued	O
support	O
for	O
CCVS	B-Library
,	O
and	O
recommended	O
that	O
customers	O
transition	O
to	O
MCVE	B-Application
.	O
</s>
<s>
The	O
CCVS	B-Library
API	O
supported	O
use	O
under	O
PHP	B-Application
,	O
Java	B-Language
,	O
Perl	B-Language
,	O
Tcl	B-Operating_System
,	O
and	O
C	B-Language
to	O
allow	O
merchants	O
to	O
communicate	O
directly	O
with	O
the	O
credit	O
card	O
clearing	O
house	O
instead	O
of	O
using	O
Internet-based	O
intermediaries	O
.	O
</s>
<s>
Along	O
with	O
Red	O
Hat	O
's	O
decision	O
to	O
discontinue	O
support	O
for	O
this	O
extension	O
,	O
it	O
has	O
also	O
been	O
removed	O
from	O
PHP	B-Application
and	O
is	O
no	O
longer	O
available	O
since	O
version	O
4.3.0	O
.	O
</s>
<s>
An	O
alternative	O
to	O
CCVS	B-Library
is	O
MCVE	B-Application
.	O
</s>
