<s>
Molecular	B-Algorithm
memory	I-Algorithm
is	O
a	O
term	O
for	O
data	B-General_Concept
storage	I-General_Concept
technologies	I-General_Concept
that	O
use	O
molecular	O
species	O
as	O
the	O
data	B-General_Concept
storage	I-General_Concept
element	O
,	O
rather	O
than	O
e.g.	O
</s>
<s>
In	O
a	O
perfect	O
molecular	B-Algorithm
memory	I-Algorithm
device	O
,	O
each	O
individual	O
molecule	O
contains	O
a	O
bit	O
of	O
data	O
,	O
leading	O
to	O
massive	O
data	O
capacity	O
.	O
</s>
<s>
However	O
,	O
practical	O
devices	O
are	O
more	O
likely	O
to	O
use	O
large	O
numbers	O
of	O
molecules	O
for	O
each	O
bit	O
,	O
in	O
the	O
manner	O
of	O
3D	O
optical	O
data	B-General_Concept
storage	I-General_Concept
(	O
many	O
examples	O
of	O
which	O
can	O
be	O
considered	O
molecular	B-Algorithm
memory	I-Algorithm
devices	O
)	O
.	O
</s>
<s>
The	O
term	O
"	O
molecular	B-Algorithm
memory	I-Algorithm
"	O
is	O
most	O
often	O
used	O
to	O
mean	O
very	O
fast	O
,	O
electronically	O
addressed	O
solid-state	O
data	B-General_Concept
storage	I-General_Concept
,	O
as	O
is	O
the	O
term	O
computer	B-General_Concept
memory	I-General_Concept
.	O
</s>
<s>
At	O
present	O
,	O
molecular	B-Algorithm
memories	I-Algorithm
are	O
still	O
found	O
only	O
in	O
laboratories	O
.	O
</s>
<s>
One	O
approach	O
to	O
molecular	B-Algorithm
memories	I-Algorithm
is	O
based	O
on	O
special	O
compounds	O
such	O
as	O
porphyrin-based	O
polymers	B-Language
which	O
are	O
capable	O
of	O
storing	O
electric	O
charge	O
.	O
</s>
<s>
Several	O
universities	O
and	O
a	O
number	O
of	O
companies	O
(	O
Hewlett	O
Packard	O
,	O
ZettaCore	O
)	O
have	O
announced	O
work	O
on	O
molecular	B-Algorithm
memories	I-Algorithm
,	O
which	O
some	O
hope	O
will	O
supplant	O
DRAM	O
memory	O
as	O
the	O
lowest	O
cost	O
technology	O
for	O
high-speed	O
computer	B-General_Concept
memory	I-General_Concept
.	O
</s>
<s>
NASA	O
is	O
also	O
supporting	O
research	O
on	O
non-volatile	B-General_Concept
molecular	B-Algorithm
memories	I-Algorithm
.	O
</s>
<s>
In	O
2018	O
,	O
researches	O
from	O
the	O
University	O
of	O
Jyväskylä	O
in	O
Finland	O
,	O
developed	O
a	O
molecular	B-Algorithm
memory	I-Algorithm
which	O
can	O
memorize	O
the	O
direction	O
of	O
a	O
magnetic	O
field	O
for	O
long	O
periods	O
of	O
time	O
after	O
being	O
switched	O
off	O
at	O
extremely	O
low	O
temperatures	O
,	O
which	O
would	O
aid	O
in	O
enhancing	O
the	O
storage	O
capacity	O
of	O
hard	B-Device
disk	I-Device
drives	I-Device
without	O
enlarging	O
their	O
physical	O
size	O
.	O
</s>
