<s>
SIGMOBILE	B-General_Concept
is	O
the	O
Association	O
for	O
Computing	O
Machinery	O
's	O
Special	O
Interest	O
Group	O
on	O
Mobility	O
of	O
Systems	O
,	O
Users	O
,	O
Data	O
and	O
Computing	O
,	O
which	O
specializes	O
in	O
the	O
field	O
of	O
mobile	O
computing	O
and	O
wireless	B-General_Concept
networks	I-General_Concept
and	O
wearable	B-Operating_System
computing	I-Operating_System
.	O
</s>
<s>
Conceived	O
in	O
early	O
1995	O
,	O
ACM	O
SIGMOBILE	B-General_Concept
started	O
out	O
as	O
an	O
organization	O
that	O
fostered	O
research	O
in	O
the	O
"	O
field	O
of	O
mobility	O
and	O
tetherless	O
ubiquitous	O
connectivity	O
"	O
.	O
</s>
<s>
On	O
February	O
8	O
,	O
2005	O
,	O
the	O
SIGMOBILE	B-General_Concept
Chapter	O
Program	O
was	O
launched	O
.	O
</s>
<s>
SIGMOBILE	B-General_Concept
sponsors	O
four	O
annual	O
international	O
conferences	O
:	O
MobiCom	O
,	O
the	O
International	O
Conference	O
on	O
Mobile	O
Computing	O
and	O
Networking	O
;	O
MobiHoc	O
,	O
the	O
International	O
Symposium	O
on	O
Mobile	O
Ad	O
Hoc	O
Networking	O
and	O
Computing	O
;	O
MobiSys	O
,	O
the	O
International	O
Conference	O
on	O
Mobile	O
Systems	O
,	O
Applications	O
,	O
and	O
Services	O
;	O
and	O
SenSys	B-Application
,	O
the	O
ACM	B-Application
Conference	I-Application
on	I-Application
Embedded	I-Application
Networked	I-Application
Sensor	I-Application
Systems	I-Application
.	O
</s>
<s>
SIGMOBILE	B-General_Concept
publishes	O
a	O
quarterly	O
journal	O
,	O
Mobile	O
Computing	O
and	O
Communications	O
Review	O
(	O
MC2R	O
)	O
,	O
as	O
well	O
as	O
the	O
annual	O
Proceedings	O
of	O
the	O
conferences	O
and	O
many	O
workshops	O
sponsored	O
by	O
SIGMOBILE	B-General_Concept
such	O
as	O
HotMobile	O
,	O
the	O
International	O
Workshop	O
on	O
Mobile	O
Computing	O
Systems	O
and	O
Applications	O
.	O
</s>
