<s>
Classic	O
Shell	B-Operating_System
is	O
a	O
computer	B-Application
program	I-Application
for	O
Microsoft	B-Application
Windows	I-Application
that	O
provides	O
user	B-Application
interface	I-Application
elements	O
intended	O
to	O
restore	O
familiar	O
features	O
from	O
past	O
versions	O
of	O
Windows	O
.	O
</s>
<s>
It	O
focuses	O
on	O
the	O
Start	O
menu	O
,	O
File	B-Protocol
Explorer	I-Protocol
and	O
Internet	B-Application
Explorer	I-Application
—	O
three	O
major	O
components	O
of	O
the	O
Windows	B-Application
shell	I-Application
although	O
it	O
also	O
does	O
some	O
minor	O
tweaks	O
for	O
the	O
Windows	O
Taskbar	O
.	O
</s>
<s>
In	O
particular	O
,	O
it	O
can	O
serve	O
as	O
a	O
Start	O
menu	O
replacement	O
for	O
Windows	B-Application
8	I-Application
and	O
Windows	B-Operating_System
10	I-Operating_System
systems	O
.	O
</s>
<s>
Development	O
has	O
been	O
picked	O
up	O
by	O
volunteers	O
on	O
GitHub	B-Application
under	O
the	O
name	O
Open-Shell	O
.	O
</s>
<s>
Classic	O
Shell	B-Operating_System
is	O
packaged	O
as	O
a	O
suite	O
of	O
three	O
components	O
,	O
all	O
optional	O
and	O
independent	O
of	O
each	O
other	O
:	O
</s>
<s>
Classic	O
Shell	B-Operating_System
is	O
programmed	O
in	O
C++	B-Language
.	O
</s>
<s>
Classic	O
Start	O
Menu	O
can	O
also	O
modify	O
Windows	B-Application
8	I-Application
's	O
new	O
UI	O
features	O
,	O
such	O
as	O
hot	O
corners	O
only	O
on	O
the	O
desktop	O
without	O
disabling	O
them	O
inside	O
Universal	O
apps	O
.	O
</s>
<s>
Classic	O
Explorer	O
is	O
an	O
add-on	O
to	O
Windows	B-Protocol
File	I-Protocol
Explorer	I-Protocol
,	O
implemented	O
as	O
various	O
shell	B-Operating_System
extensions	O
.	O
</s>
<s>
Classic	O
Shell	B-Operating_System
began	O
as	O
a	O
tool	O
for	O
personal	O
use	O
,	O
and	O
saw	O
its	O
first	O
public	O
release	O
in	O
2009	O
.	O
</s>
<s>
Over	O
time	O
,	O
the	O
Start	O
Menu	O
component	O
evolved	O
to	O
be	O
a	O
customizable	O
launcher	O
that	O
also	O
integrated	O
a	O
search	O
box	O
and	O
other	O
features	O
of	O
the	O
Windows	B-Device
7	I-Device
Start	O
Menu	O
.	O
</s>
<s>
While	O
earlier	O
versions	O
were	O
compatible	O
with	O
Windows	B-Application
Vista	I-Application
and	O
later	O
,	O
versions	O
since	O
3.9.0	O
no	O
longer	O
support	O
Windows	O
Vista/Server	O
2008	O
.	O
</s>
<s>
Classic	O
Shell	B-Operating_System
was	O
never	O
popular	O
or	O
necessary	O
on	O
Vista	B-Application
in	O
the	O
first	O
place	O
because	O
Vista	B-Application
,	O
like	O
XP	O
,	O
came	O
with	O
the	O
ability	O
to	O
revert	O
to	O
a	O
classic	O
start	O
menu	O
.	O
</s>
<s>
Classic	O
Shell	B-Operating_System
is	O
released	O
as	O
free	B-License
and	I-License
open-source	I-License
under	O
the	B-License
MIT	I-License
license	I-License
.	O
</s>
<s>
Since	O
2018	O
,	O
Classic	O
Shell	B-Operating_System
has	O
been	O
developed	O
as	O
an	O
open	O
source	O
program	B-Application
under	O
the	O
name	O
Open-Shell	O
.	O
</s>
<s>
Open-Shell	O
has	O
remained	O
functionally	O
similar	O
to	O
Classic	O
Shell	B-Operating_System
,	O
but	O
it	O
has	O
added	O
some	O
small	O
features	O
and	O
addressed	O
several	O
bugs	O
,	O
many	O
caused	O
by	O
new	O
versions	O
of	O
Windows	O
.	O
</s>
<s>
Some	O
of	O
the	O
changes	O
in	O
Open-Shell	O
include	O
:	O
</s>
<s>
Like	O
Classic	O
Shell	B-Operating_System
,	O
Open-Shell	O
is	O
released	O
under	O
the	B-License
MIT	I-License
License	I-License
.	O
</s>
<s>
Classic	O
Shell	B-Operating_System
was	O
a	O
fairly	O
popular	O
interface	O
enhancement	O
in	O
the	O
Windows	B-Device
7	I-Device
life	O
cycle	O
but	O
became	O
much	O
more	O
widely	O
used	O
after	O
the	O
release	O
and	O
negative	O
reception	O
of	O
Windows	B-Application
8	I-Application
(	O
with	O
its	O
lack	O
of	O
a	O
Start	O
menu	O
)	O
.	O
</s>
