<s>
Drupal	B-Application
Commerce	I-Application
is	O
open-source	B-Application
eCommerce	O
software	O
that	O
augments	O
the	O
content	B-Protocol
management	I-Protocol
system	I-Protocol
Drupal	B-Application
.	O
</s>
<s>
Within	O
the	O
context	O
of	O
a	O
Drupal-based	O
site	O
,	O
Drupal	B-Application
Commerce	I-Application
presents	O
products	O
for	O
purchase	O
;	O
walks	O
customers	O
through	O
the	O
checkout	O
process	O
;	O
keeps	O
track	O
of	O
invoices	O
,	O
receipts	O
,	O
orders	O
,	O
and	O
payments	O
;	O
facilitates	O
shipping	O
and	O
payment	O
;	O
and	O
performs	O
other	O
functions	O
needed	O
by	O
online	O
merchants	O
.	O
</s>
<s>
Drupal	B-Application
Commerce	I-Application
was	O
created	O
by	O
Commerce	O
Guys	O
under	O
the	O
leadership	O
of	O
Ryan	O
Szrama	O
,	O
the	O
author	O
of	O
shopping-cart	O
software	O
Übercart	O
.	O
</s>
<s>
It	O
was	O
originally	O
born	O
as	O
a	O
rearchitecture	O
project	O
of	O
Übercart	O
,	O
and	O
was	O
called	O
"	O
Übercore	O
"	O
until	O
January	O
14	O
,	O
2010	O
,	O
when	O
Mr.	O
Szrama	O
renamed	O
it	O
"	O
Drupal	B-Application
Commerce	I-Application
"	O
.	O
</s>
<s>
Drupal	B-Application
Commerce	I-Application
has	O
had	O
steady	O
growth	O
since	O
its	O
introduction	O
.	O
</s>
<s>
The	O
Drupal	B-Application
Commerce	I-Application
market	O
has	O
also	O
supported	O
publication	O
of	O
several	O
instructional	O
books	O
and	O
video	O
courses	O
.	O
</s>
<s>
Like	O
Drupal	B-Application
itself	O
,	O
Drupal	B-Application
Commerce	I-Application
can	O
be	O
extended	O
through	O
the	O
use	O
of	O
modules	O
that	O
add	O
functionality	O
and	O
themes	O
that	O
define	O
visual	O
presentation	O
.	O
</s>
