<s>
Orleans	B-General_Concept
is	O
a	O
cross-platform	B-Operating_System
software	I-Operating_System
framework	O
for	O
building	O
scalable	O
and	O
robust	O
distributed	O
interactive	O
applications	O
based	O
on	O
the	O
.NET	B-Application
Framework	I-Application
or	O
on	O
the	O
more	O
recent	O
.NET	B-Application
.	O
</s>
<s>
Orleans	B-General_Concept
was	O
originally	O
created	O
by	O
the	O
eXtreme	O
Computing	O
Group	O
at	O
Microsoft	O
Research	O
and	O
introduced	O
the	O
Virtual	O
Actor	O
Model	O
as	O
a	O
new	O
approach	O
to	O
building	O
distributed	B-Architecture
systems	I-Architecture
for	O
the	B-Architecture
cloud	I-Architecture
.	O
</s>
<s>
Orleans	B-General_Concept
scales	O
from	O
a	O
single	O
on-premises	B-General_Concept
server	O
to	O
highly-available	O
and	O
globally	O
distributed	B-Architecture
applications	I-Architecture
in	B-Architecture
the	I-Architecture
cloud	I-Architecture
.	O
</s>
<s>
Starting	O
with	O
cloud	B-Architecture
services	I-Architecture
for	O
the	O
Halo	O
franchise	O
,	O
the	O
framework	O
has	O
been	O
used	O
by	O
a	O
number	O
of	O
cloud	B-Architecture
services	I-Architecture
at	O
Microsoft	O
and	O
other	O
companies	O
since	O
2011	O
.	O
</s>
<s>
The	O
core	O
Orleans	B-General_Concept
technology	O
was	O
transferred	O
to	O
343	O
Industries	O
and	O
is	O
available	O
as	O
open	B-License
source	I-License
since	O
January	O
2015	O
.	O
</s>
<s>
The	O
source	O
code	O
is	O
licensed	O
under	O
MIT	B-License
License	I-License
and	O
hosted	O
on	O
GitHub	B-Application
.	O
</s>
<s>
Orleans	B-General_Concept
runs	O
on	O
Microsoft	B-Application
Windows	I-Application
,	O
Linux	B-Application
,	O
and	O
macOS	B-Application
and	O
is	O
compatible	O
with	O
.NET	B-Application
Standard	O
2.0	O
and	O
above	O
.	O
</s>
<s>
Some	O
Orleans	B-General_Concept
features	O
include	O
:	O
</s>
<s>
It	O
is	O
a	O
Java	B-Language
implementation	O
of	O
virtual	O
actors	O
that	O
was	O
heavily	O
inspired	O
by	O
the	O
Orleans	B-General_Concept
project	O
.	O
</s>
