<s>
Boo	B-Application
is	O
an	O
object-oriented	B-Language
,	O
statically	O
typed	O
,	O
general-purpose	B-Language
programming	I-Language
language	I-Language
that	O
seeks	O
to	O
make	O
use	O
of	O
the	O
Common	O
Language	O
Infrastructure	O
's	O
support	O
for	O
Unicode	O
,	O
internationalization	B-General_Concept
,	O
and	O
web	O
applications	O
,	O
while	O
using	O
a	O
Python-inspired	O
syntax	O
and	O
a	O
special	O
focus	O
on	O
language	O
and	O
compiler	O
extensibility	O
.	O
</s>
<s>
Some	O
features	O
of	O
note	O
include	O
type	O
inference	O
,	O
generators	O
,	O
multimethods	O
,	O
optional	O
duck	B-Application
typing	I-Application
,	O
macros	O
,	O
true	O
closures	B-Language
,	O
currying	B-Application
,	O
and	O
first-class	B-Application
functions	I-Application
.	O
</s>
<s>
Boo	B-Application
was	O
one	O
of	O
the	O
three	O
scripting	O
languages	O
for	O
the	O
Unity	B-Application
game	I-Application
engine	I-Application
(	O
Unity	O
Technologies	O
employed	O
De	O
Oliveira	O
,	O
its	O
designer	O
)	O
,	O
until	O
official	O
support	O
was	O
dropped	O
in	O
2014	O
due	O
to	O
the	O
small	O
userbase	O
.	O
</s>
<s>
The	O
Boo	B-Application
Compiler	O
was	O
removed	O
from	O
the	O
engine	O
in	O
2017	O
.	O
</s>
<s>
Boo	B-Application
has	O
since	O
been	O
abandoned	O
by	O
De	O
Oliveira	O
,	O
with	O
development	O
being	O
taken	O
over	O
by	O
Mason	O
Wheeler	O
.	O
</s>
<s>
Boo	B-Application
is	O
free	B-Application
software	I-Application
released	O
under	O
the	O
BSD	B-Operating_System
3-Clause	I-Operating_System
license	I-Operating_System
.	O
</s>
<s>
It	O
is	O
compatible	O
with	O
the	O
Microsoft	O
.NET	B-Application
and	O
Mono	B-Application
frameworks	I-Application
.	O
</s>
