<s>
Activity	B-Application
Streams	I-Application
is	O
an	O
open	O
format	O
specification	O
for	O
activity	O
stream	O
protocols	O
,	O
which	O
are	O
used	O
to	O
syndicate	O
activities	O
taken	O
in	O
social	O
web	O
applications	O
and	O
services	O
,	O
similar	O
to	O
those	O
in	O
Facebook	B-Application
's	O
,	O
Instagram	B-Application
's	O
,	O
and	O
Twitter	B-Application
's	O
.	O
</s>
<s>
Implementors	O
of	O
the	O
activity	O
Activity	B-Application
Streams	I-Application
draft	O
include	O
Gnip	B-Application
,	O
Stream	O
,	O
Stream	O
Framework	O
,	O
and	O
Pump.io	B-Operating_System
.	O
</s>
