<s>
A	O
datacard	B-Device
is	O
an	O
electronic	O
card	O
for	O
data	O
operations	O
(	O
storage	O
,	O
transfer	O
,	O
transformation	O
,	O
input	O
,	O
output	O
)	O
.	O
</s>
<s>
Datacards	B-Device
can	O
be	O
sorted	O
by	O
their	O
purposes	O
:	O
</s>
<s>
Expansion	B-Device
card	I-Device
–	O
printed-circuit	O
board	O
:	O
inserted	O
in	O
a	O
special	O
slot	O
in	O
the	O
device	O
and	O
used	O
to	O
add	O
functions	O
to	O
this	O
device	O
;	O
</s>
<s>
Memory	B-Device
card	I-Device
or	O
flash	B-Device
card	O
:	O
a	O
card	O
which	O
is	O
inserted	O
into	O
the	O
corresponding	O
device	O
socket	O
and	O
used	O
for	O
data	O
storage	O
and	O
transmission	O
;	O
</s>
<s>
Datacard	B-Device
or	O
"	O
electronic	O
card	O
"	O
:	O
a	O
card	O
dealing	O
with	O
e.g.	O
</s>
<s>
The	O
expansion	B-Device
card	I-Device
in	O
the	O
computer	O
is	O
equipped	O
with	O
contacts	O
on	O
one	O
of	O
its	O
edges	O
,	O
and	O
it	O
can	O
be	O
inserted	O
into	O
the	O
motherboard	B-Device
slot	O
socket	O
.	O
</s>
<s>
There	O
are	O
various	O
types	O
of	O
expansion	B-Device
cards	I-Device
:	O
</s>
<s>
A	O
videocard	B-Device
transforms	O
data	O
from	O
the	O
computer	O
memory	O
into	O
the	O
video	O
signal	O
for	O
the	O
monitor	O
.	O
</s>
<s>
The	O
videocard	B-Device
has	O
its	O
own	O
processor	O
,	O
relieving	O
the	O
CPU	B-Device
of	O
the	O
computer	O
;	O
</s>
<s>
A	O
sound	B-Device
card	I-Device
enables	O
the	O
computer	O
to	O
work	O
with	O
sound	O
;	O
</s>
<s>
A	O
network	B-Protocol
card	I-Protocol
enables	O
the	O
computer	O
to	O
interact	O
on	O
a	O
local	B-General_Concept
network	I-General_Concept
.	O
</s>
<s>
Many	O
modern	O
devices	O
demand	O
non-volatile	B-General_Concept
memory	I-General_Concept
requiring	O
low	O
power	O
.	O
</s>
<s>
Flash	B-Device
memory	I-Device
is	O
used	O
for	O
these	O
purposes	O
.	O
</s>
<s>
It	O
is	O
widespread	O
in	O
digital	O
portable	B-Application
devices	I-Application
such	O
as	O
photo	O
and	O
video	O
cameras	O
,	O
dictaphones	O
,	O
MP3	O
players	O
,	O
handheld	B-Application
computers	I-Application
,	O
mobile	O
phones	O
,	O
and	O
also	O
in	O
smart	B-Application
phones	I-Application
and	O
communicators	O
.	O
</s>
<s>
It	O
is	O
used	O
for	O
storage	O
of	O
the	O
built-in	O
software	O
in	O
various	O
devices	O
(	O
like	O
routers	O
,	O
mini-phonestations	O
,	O
printers	O
,	O
scanners	O
,	O
modems	B-Application
and	O
controllers	O
)	O
.	O
</s>
<s>
In	O
recent	O
years	O
USB	B-Protocol
flash-drives	O
have	O
become	O
more	O
popular	O
and	O
have	O
almost	O
replaced	O
diskettes	B-Device
and	O
CDs	O
.	O
</s>
<s>
Flash	B-Device
memory	I-Device
is	O
well	O
known	O
from	O
its	O
use	O
in	O
USB	B-Protocol
flash-drives	O
.	O
</s>
<s>
Flash	B-Device
cards	O
also	O
are	O
based	O
on	O
flash	B-Device
memory	I-Device
,	O
such	O
as	O
Secure	B-Device
Digital	I-Device
(	O
SD	O
)	O
,	O
Compact	B-Device
Flash	I-Device
and	O
Memory	O
Stick	O
.	O
</s>
<s>
These	O
are	O
much	O
used	O
in	O
portable	B-Application
devices	I-Application
(	O
cameras	O
,	O
mobile	O
phones	O
)	O
.	O
</s>
<s>
Flash	B-Device
memory	I-Device
constitutes	O
the	O
biggest	O
part	O
of	O
the	O
portable	O
data	O
device	O
market	O
.	O
</s>
<s>
This	O
is	O
often	O
a	O
microcircuit	O
,	O
such	O
as	O
a	O
SIM	O
card	O
segregated	O
from	O
the	O
ISO/IEC	O
7816	O
card	O
and	O
mounted	O
in	O
a	O
tiny	O
case	O
with	O
reader	O
and	O
USB	B-Protocol
connector	O
.	O
</s>
