<s>
The	O
Nokia	B-Language
Eseries	I-Language
consists	O
of	O
business-oriented	O
smartphones	O
running	O
Symbian	B-Operating_System
OS	I-Operating_System
,	O
with	O
emphasis	O
on	O
enhanced	O
connectivity	O
and	O
support	O
for	O
corporate	O
e-mail	O
push	O
services	O
,	O
as	O
well	O
as	O
enterprise-styled	O
products	O
and	O
many	O
featuring	O
QWERTY	O
keyboards	O
.	O
</s>
<s>
All	O
devices	O
have	O
advanced	O
office	O
features	O
through	O
its	O
S60	B-Language
platform	I-Language
.	O
</s>
<s>
Phones	O
equipped	O
with	O
Wireless	B-Architecture
LAN	I-Architecture
also	O
provide	O
a	O
VoIP	B-Application
client	O
(	O
SIP	B-Application
Protocol	O
)	O
.	O
</s>
<s>
Throughout	O
the	O
series	O
 '	O
lifetime	O
its	O
main	O
competitors	O
were	O
BlackBerry	B-Operating_System
products	O
from	O
Research	O
In	O
Motion	O
.	O
</s>
<s>
The	O
Eseries	B-Language
was	O
marketed	O
until	O
2011	O
.	O
</s>
<s>
On	O
October	O
12	O
,	O
2005	O
,	O
mobile	O
phone	O
manufacturer	O
Nokia	O
announced	O
what	O
the	O
company	O
refers	O
to	O
as	O
the	O
Eseries	B-Language
,	O
consisting	O
of	O
the	O
three	O
mobile	O
phones	O
,	O
the	O
Nokia	B-Language
E60	I-Language
,	O
Nokia	B-Language
E61	I-Language
and	O
Nokia	O
E70	O
.	O
</s>
<s>
On	O
May	O
18	O
,	O
2006	O
,	O
Nokia	O
announced	O
the	O
addition	O
of	O
the	O
E50	B-Language
to	O
the	O
series	O
,	O
which	O
it	O
refers	O
to	O
as	O
a	O
"	O
business	O
device	O
"	O
rather	O
than	O
a	O
"	O
smartphone	O
"	O
.	O
</s>
<s>
On	O
February	O
12	O
,	O
2007	O
,	O
Nokia	O
announced	O
the	O
addition	O
of	O
three	O
new	O
devices	O
to	O
the	O
series	O
;	O
E61i	B-Language
,	O
E65	O
and	O
E90	B-Language
Communicator	I-Language
.	O
</s>
<s>
On	O
April	O
11	O
,	O
2008	O
,	O
Nokia	O
Australia	O
has	O
advised	O
that	O
the	O
E61i	B-Language
will	O
be	O
discontinued	O
in	O
May	O
2008	O
and	O
be	O
replaced	O
by	O
a	O
more	O
featured	O
but	O
smaller	O
E71	B-Language
.	O
</s>
<s>
Later	O
releases	O
included	O
E72	B-Language
,	O
E52	B-Language
and	O
E5	B-Language
.	O
</s>
<s>
The	O
last	O
Eseries	B-Language
device	O
was	O
the	O
Nokia	O
E6	O
from	O
2011	O
.	O
</s>
