<s>
Hypermail	B-Protocol
is	O
a	O
free	B-Application
program	O
for	O
creating	O
email	O
archives	O
,	O
in	O
the	O
form	O
of	O
cross-referenced	O
HTML	B-Language
documents	O
.	O
</s>
<s>
It	O
takes	O
a	O
file	O
in	O
Unix	B-Application
mbox	B-Application
format	O
and	O
generates	O
an	O
HTML	B-Language
archive	O
,	O
complete	O
with	O
an	O
index	O
and	O
various	O
sorting	O
options	O
.	O
</s>
<s>
Originally	O
written	O
in	O
1994	O
by	O
Tom	O
Gruber	O
using	O
Common	B-Language
Lisp	I-Language
,	O
it	O
was	O
rewritten	O
in	O
C	B-Language
by	O
Kevin	O
Hughes	O
for	O
its	O
initial	O
public	O
release	O
in	O
1994	O
.	O
</s>
<s>
The	O
mbox	B-Application
format	O
is	O
used	O
by	O
several	O
email	B-Protocol
clients	I-Protocol
on	O
various	O
platforms	O
,	O
including	O
most	O
Unix	B-Application
and	O
Linux	B-Application
ones	O
.	O
</s>
<s>
Popular	O
examples	O
of	O
email	B-Protocol
clients	I-Protocol
that	O
use	O
the	O
mbox	B-Application
format	O
(	O
and	O
as	O
such	O
are	O
compatible	O
with	O
Hypermail	B-Protocol
)	O
include	O
Kmail	O
,	O
pine	B-Operating_System
and	O
Mozilla	B-Application
Thunderbird	I-Application
.	O
</s>
<s>
Hypermail	B-Protocol
is	O
operated	O
at	O
the	O
command-line	B-Application
.	O
</s>
<s>
It	O
was	O
originally	O
intended	O
for	O
use	O
in	O
Unix-like	B-Operating_System
platforms	O
such	O
as	O
Linux	B-Application
.	O
</s>
<s>
However	O
,	O
it	O
is	O
also	O
possible	O
to	O
use	O
the	O
program	O
in	O
Microsoft	B-Application
Windows	I-Application
by	O
compiling	B-Language
it	O
with	O
MinGW	B-Application
,	O
or	O
by	O
using	O
the	O
Cygwin	B-Language
library	O
.	O
</s>
<s>
It	O
is	O
possible	O
to	O
compile	B-Language
Hypermail	B-Protocol
as	O
a	O
fully	O
native	B-Language
Windows	O
program	O
by	O
using	O
MinGW	B-Application
.	O
</s>
<s>
Instructions	O
are	O
also	O
available	O
for	O
creating	O
the	O
executable	O
using	O
Cygwin	B-Language
.	O
</s>
