<s>
LEGO	B-Language
is	O
a	O
proof	O
assistant	O
developed	O
by	O
Randy	O
Pollack	O
at	O
the	O
University	O
of	O
Edinburgh	O
.	O
</s>
<s>
It	O
implements	O
several	O
type	O
theories	O
:	O
the	O
Edinburgh	O
Logical	O
Framework	O
(	O
LF	O
)	O
,	O
the	O
Calculus	B-Application
of	I-Application
Constructions	I-Application
(	O
CoC	O
)	O
,	O
the	O
Generalized	O
Calculus	B-Application
of	I-Application
Constructions	I-Application
(	O
GCC	O
)	O
and	O
the	O
Unified	O
Theory	O
of	O
Dependent	O
Types	O
(	O
UTT	O
)	O
.	O
</s>
