<s>
Concurrent	B-Application
object-oriented	I-Application
programming	I-Application
is	O
a	O
programming	O
paradigm	O
which	O
combines	O
object-oriented	B-Language
programming	I-Language
(	O
OOP	O
)	O
together	O
with	O
concurrency	B-Operating_System
.	O
</s>
<s>
While	O
numerous	O
programming	O
languages	O
,	O
such	O
as	O
Java	B-Language
,	O
combine	O
OOP	O
with	O
concurrency	B-Operating_System
mechanisms	O
like	O
threads	B-Operating_System
,	O
the	O
phrase	O
"	O
concurrent	B-Application
object-oriented	I-Application
programming	I-Application
"	O
primarily	O
refers	O
to	O
systems	O
where	O
objects	O
themselves	O
are	O
a	O
concurrency	B-Operating_System
primitive	O
,	O
such	O
as	O
when	O
objects	O
are	O
combined	O
with	O
the	O
actor	B-Application
model	I-Application
.	O
</s>
