<s>
A	O
distribution	B-General_Concept
list	I-General_Concept
is	O
an	O
application	O
of	O
email	B-Protocol
client	I-Protocol
programs	I-Protocol
that	O
allows	O
a	O
user	O
to	O
maintain	O
a	O
list	O
of	O
email	O
addresses	O
and	O
send	O
messages	O
to	O
all	O
of	O
them	O
at	O
once	O
.	O
</s>
<s>
Sending	O
mail	O
using	O
a	O
distribution	B-General_Concept
list	I-General_Concept
differs	O
from	O
an	O
electronic	O
mailing	O
list	O
or	O
the	O
email	O
option	O
found	O
in	O
an	O
Internet	B-Application
forum	I-Application
as	O
it	O
is	O
usually	O
for	O
one-way	O
traffic	O
and	O
not	O
for	O
coordinating	O
a	O
discussion	O
.	O
</s>
<s>
A	O
distribution	B-General_Concept
list	I-General_Concept
is	O
an	O
email	O
equivalent	O
of	O
a	O
postal	O
mailing	O
list	O
.	O
</s>
