<s>
The	O
Online	O
Operating	O
System	O
was	O
a	O
fully	O
multi-lingual	O
and	O
free	O
to	O
use	O
web	O
desktop	O
written	O
in	O
JavaScript	B-Language
using	O
Ajax	B-General_Concept
.	O
</s>
<s>
It	O
was	O
a	O
Windows-based	O
desktop	O
environment	O
with	O
open-source	B-Application
applications	I-Application
and	O
system	O
utilities	O
developed	O
upon	O
the	O
reBOX	O
web	B-Application
application	I-Application
framework	O
by	O
,	O
an	O
Austrian	O
company	O
located	O
in	O
Vienna	O
.	O
</s>
<s>
,	O
which	O
is	O
short	O
for	O
Online	O
Operating	O
System	O
,	O
was	O
a	O
web	B-Application
application	I-Application
platform	O
that	O
mimicked	O
the	O
look	O
and	O
feel	O
of	O
classic	O
desktop	O
operating	O
systems	O
such	O
as	O
Microsoft	B-Application
Windows	I-Application
,	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
or	O
KDE	B-Application
.	O
</s>
<s>
It	O
consisted	O
of	O
various	O
open	O
source	O
applications	O
built	O
upon	O
the	O
so-called	O
reBOX	O
web	B-Application
application	I-Application
framework	O
.	O
</s>
<s>
It	O
provided	O
basic	O
services	O
such	O
as	O
a	O
GUI	B-Application
,	O
a	O
virtual	O
file	B-Application
system	I-Application
,	O
access	O
control	O
management	O
and	O
possibilities	O
to	O
develop	O
and	O
deploy	O
applications	O
online	O
.	O
</s>
<s>
As	O
the	O
Online	O
Operating	O
System	O
was	O
executed	O
within	O
a	O
web	B-Application
browser	I-Application
,	O
it	O
was	O
no	O
real	O
operating	O
system	O
but	O
rather	O
a	O
portal	O
to	O
various	O
web	B-Application
applications	I-Application
,	O
offering	O
a	O
high	O
usability	O
and	O
flexibility	O
.	O
</s>
<s>
Hence	O
,	O
together	O
with	O
YouOS	B-General_Concept
and	O
eyeOS	B-Application
,	O
it	O
can	O
be	O
considered	O
to	O
be	O
one	O
of	O
the	O
first	O
publicly	O
available	O
systems	O
of	O
its	O
kind	O
.	O
</s>
<s>
The	O
first	O
full	O
version	O
including	O
core-level	O
multi-language	O
support	O
,	O
the	O
file	B-Application
system	I-Application
and	O
a	O
basic	O
set	O
of	O
applications	O
was	O
released	O
to	O
the	O
public	O
in	O
March	O
2007	O
on	O
the	O
occasion	O
of	O
a	O
national	O
exhibition	O
(	O
)	O
and	O
has	O
left	O
beta	O
state	O
half	O
a	O
year	O
later	O
in	O
October	O
2007	O
.	O
</s>
<s>
The	O
project	O
is	O
fully	O
written	O
in	O
JavaScript	B-Language
,	O
exclusively	O
using	O
DHTML	B-General_Concept
techniques	O
to	O
run	O
in	O
any	O
web	B-Application
browser	I-Application
without	O
any	O
additional	O
software	O
installation	O
needed	O
.	O
</s>
<s>
The	O
system	O
implements	O
a	O
modern	O
kind	O
of	O
web	B-Application
application	I-Application
model	O
,	O
excessively	O
using	O
Ajax	B-General_Concept
for	O
communicating	O
between	O
client	O
components	O
and	O
the	O
Java	B-Language
server	O
backend	O
in	O
an	O
exclusively	O
asynchronous	O
manner	O
.	O
</s>
<s>
Aim	O
is	O
to	O
offer	O
users	O
the	O
unique	O
interaction	O
behavior	O
following	O
the	O
desktop	B-Application
metaphor	I-Application
,	O
which	O
is	O
the	O
main	O
idea	O
of	O
any	O
web	O
desktop	O
.	O
</s>
<s>
Also	O
typical	O
for	O
this	O
sort	O
of	O
web	B-Application
application	I-Application
is	O
the	O
broadly	O
use	O
of	O
Javascript-on-demand	O
techniques	O
,	O
cutting	O
the	O
complete	O
project	O
source	O
into	O
pieces	O
and	O
loading	O
them	O
instantly	O
when	O
needed	O
.	O
</s>
<s>
It	O
is	O
a	O
fully	O
flexible	O
and	O
extensible	O
API	O
,	O
including	O
a	O
GUI	B-Application
widget	O
set	O
,	O
communication	O
mechanisms	O
and	O
server	O
services	O
offering	O
general	O
and	O
framework	O
specific	O
services	O
.	O
</s>
<s>
The	O
Online	O
Operating	O
System	O
itself	O
consisted	O
of	O
a	O
basic	O
framework	O
,	O
which	O
was	O
able	O
to	O
launch	O
any	O
JavaScript	B-Language
application	O
using	O
the	O
reBOX	O
library	O
.	O
</s>
<s>
At	O
server	O
side	O
,	O
there	O
were	O
Java	B-Language
based	O
web	O
services	O
that	O
ran	O
to	O
serve	O
the	O
client	O
processes	O
and	O
to	O
provide	O
data	O
from	O
the	O
relational	B-Application
database	I-Application
in	O
the	O
backend	O
.	O
</s>
<s>
Next	O
releases	O
were	O
planned	O
to	O
focus	O
on	O
an	O
extensive	O
security	O
and	O
privacy	O
suite	O
,	O
dealing	O
with	O
challenges	O
like	O
anonymous	O
communication	O
(	O
browsing	O
as	O
well	O
as	O
temporary	O
mail-addresses	O
)	O
as	O
well	O
as	O
offering	O
encrypted	O
password	O
and	O
file	B-Application
storage	I-Application
and	O
connectivity	O
services	O
.	O
</s>
<s>
Since	O
its	O
initial	O
stable	O
release	O
,	O
OOS.cc	O
could	O
have	O
been	O
accessed	O
using	O
https	B-Protocol
to	O
ensure	O
secure	O
communication	O
.	O
</s>
<s>
One	O
of	O
the	O
key	O
focuses	O
of	O
the	O
team	O
was	O
right	O
from	O
the	O
beginning	O
to	O
offer	O
a	O
very	O
flexible	O
and	O
comprehensive	O
API	O
,	O
that	O
can	O
be	O
used	O
to	O
develop	O
not	O
only	O
custom	O
applications	O
within	O
oos.cc,	O
but	O
also	O
stand-alone	O
web-applications	B-Application
or	O
to	O
integrate	O
single	O
components	O
in	O
existing	O
web-sites	O
.	O
</s>
<s>
By	O
decoupling	O
the	O
development	O
from	O
web-related	O
"	O
problems	O
"	O
using	O
the	O
reBOX	O
API	O
web-applications	B-Application
can	O
be	O
development	O
in	O
a	O
similar	O
fashion	O
to	O
any	O
Java	B-Language
program	O
:	O
Elements	O
can	O
be	O
positioned	O
and	O
can	O
interact	O
like	O
in	O
high-level	O
object	B-Language
oriented	I-Language
programming	I-Language
languages	I-Language
,	O
without	O
taking	O
care	O
of	O
divs	O
,	O
browser	B-Application
specific	O
behavior	O
or	O
communication	O
handling	O
.	O
</s>
