<s>
Massively	B-Protocol
multiplayer	I-Protocol
online	I-Protocol
real-time	I-Protocol
strategy	I-Protocol
game	I-Protocol
(	O
MMORTS	B-Protocol
)	O
mixes	O
the	O
genres	O
of	O
real-time	O
strategy	O
and	O
massively	B-Application
multiplayer	I-Application
online	I-Application
games	I-Application
,	O
possibly	O
in	O
the	O
form	O
of	O
web	O
browser-based	O
games	O
,	O
in	O
which	O
a	O
very	O
large	O
number	O
of	O
players	O
interact	O
with	O
one	O
another	O
within	O
a	O
virtual	B-Application
world	I-Application
.	O
</s>
<s>
The	O
titles	O
are	O
often	O
based	O
in	O
a	O
sci-fi	O
or	O
fantasy	B-Application
universe	O
and	O
are	O
distinguished	O
from	O
single	O
or	O
small-scale	O
multiplayer	O
RTSes	O
by	O
the	O
number	O
of	O
players	O
and	O
common	O
use	O
of	O
a	O
persistent	O
world	O
,	O
generally	O
hosted	O
by	O
the	O
game	O
's	O
publisher	O
,	O
which	O
continues	O
to	O
evolve	O
even	O
when	O
the	O
player	O
is	O
offline	O
.	O
</s>
<s>
Such	O
a	O
virtual	B-Application
economy	I-Application
can	O
be	O
analyzed	O
(	O
using	O
data	O
logged	O
by	O
the	O
game	O
)	O
and	O
has	O
value	O
in	O
economic	O
research	O
;	O
more	O
significantly	O
,	O
these	O
"	O
virtual	O
"	O
economies	O
can	O
affect	O
the	O
economies	O
of	O
the	O
real	O
world	O
.	O
</s>
