<s>
Perpetual	B-General_Concept
beta	I-General_Concept
is	O
the	O
keeping	O
of	O
software	B-Application
or	O
a	O
system	O
at	O
the	O
beta	O
development	O
stage	O
for	O
an	O
extended	O
or	O
indefinite	O
period	O
of	O
time	O
.	O
</s>
<s>
Perpetual	B-General_Concept
beta	I-General_Concept
software	B-Application
is	O
not	O
recommended	O
for	O
mission	B-Application
critical	I-Application
machines	O
.	O
</s>
<s>
Perpetual	B-General_Concept
beta	I-General_Concept
has	O
come	O
to	O
be	O
associated	O
with	O
the	O
development	O
and	O
release	O
of	O
a	O
service	O
in	O
which	O
constant	O
updates	O
are	O
the	O
foundation	O
for	O
the	O
habitability	O
or	O
usability	O
of	O
a	O
service	O
.	O
</s>
<s>
According	O
to	O
publisher	O
and	O
open	B-License
source	I-License
advocate	O
Tim	O
O'Reilly	O
:	O
</s>
<s>
Users	O
must	O
be	O
treated	O
as	O
co-developers	O
,	O
in	O
a	O
reflection	O
of	O
open	B-License
source	I-License
development	O
practices	O
(	O
even	O
if	O
the	B-Application
software	I-Application
in	O
question	O
is	O
unlikely	O
to	O
be	O
released	O
under	O
an	O
open	B-License
source	I-License
license	O
.	O
)	O
</s>
<s>
The	O
open	B-License
source	I-License
dictum	O
,	O
"	O
release	O
early	O
and	O
release	O
often	O
"	O
,	O
in	O
fact	O
has	O
morphed	O
into	O
an	O
even	O
more	O
radical	O
position	O
,	O
"	O
the	O
perpetual	B-General_Concept
beta	I-General_Concept
"	O
,	O
in	O
which	O
the	O
product	O
is	O
developed	O
in	O
the	O
open	O
,	O
with	O
new	O
features	O
slipstreamed	O
in	O
on	O
a	O
monthly	O
,	O
weekly	O
,	O
or	O
even	O
daily	O
basis	O
.	O
</s>
<s>
It	O
's	O
no	O
accident	O
that	O
services	O
such	O
as	O
Gmail	B-Application
,	O
Google	B-Application
Maps	I-Application
,	O
Flickr	B-Algorithm
,	O
del.icio.us,	O
and	O
the	O
like	O
may	O
be	O
expected	O
to	O
bear	O
a	O
"	O
Beta	O
"	O
logo	O
for	O
years	O
at	O
a	O
time	O
.	O
</s>
<s>
Used	O
in	O
the	O
larger	O
conversation	O
of	O
what	O
defines	O
Web	O
2.0	O
,	O
O'Reilly	O
described	O
the	O
concept	O
of	O
perpetual	B-General_Concept
beta	I-General_Concept
as	O
part	O
of	O
a	O
customized	O
Internet	O
environment	O
with	O
these	O
applications	O
as	O
distinguishing	O
characteristics	O
:	O
</s>
