<s>
RScheme	B-Language
is	O
a	O
Scheme	B-Language
implementation	O
developed	O
by	O
Donovan	O
Kolbly	O
,	O
with	O
an	O
object-orientation	O
approach	O
adapted	O
from	O
Dylan	B-Language
.	O
</s>
<s>
RScheme	B-Language
implements	O
all	O
of	O
R4RS	B-Language
except	O
transcript-on	O
and	O
transcript-off	O
,	O
and	O
all	O
of	O
R5RS	B-Language
except	O
define-syntax	B-Application
.	O
</s>
<s>
In	O
addition	O
,	O
RScheme	B-Language
has	O
a	O
reflective	O
object	O
system	O
,	O
many	O
operating	O
system	O
services	O
,	O
modules	O
,	O
threads	O
,	O
and	O
other	O
systems	O
programming	O
features	O
,	O
including	O
the	O
ability	O
to	O
integrate	O
with	O
and	O
compile	O
to	O
C	O
code	O
.	O
</s>
<s>
Code	O
in	O
RScheme	B-Language
can	O
be	O
compiled	O
to	O
C	O
,	O
and	O
the	O
C	O
can	O
then	O
compiled	O
with	O
a	O
normal	O
C	O
compiler	O
to	O
generate	O
machine	O
code	O
.	O
</s>
<s>
By	O
default	O
,	O
to	O
keep	O
compilation	O
fast	O
and	O
the	O
code	O
size	O
down	O
,	O
RScheme	B-Language
compiles	O
to	O
bytecodes	O
which	O
are	O
interpreted	O
by	O
a	O
(	O
runtime	O
)	O
virtual	O
machine	O
.	O
</s>
<s>
RScheme	B-Language
is	O
the	O
only	O
known	O
publicly	O
available	O
Scheme	B-Language
implementation	O
to	O
include	O
a	O
real-time	O
safe	O
garbage	B-General_Concept
collector	I-General_Concept
.	O
</s>
