<s>
Rietveld	B-Language
is	O
a	O
web-based	O
collaborative	O
code	O
review	O
tool	O
for	O
Subversion	B-Application
written	O
by	O
Guido	O
van	O
Rossum	O
to	O
run	O
on	O
Google	B-Application
's	I-Application
cloud	B-Application
service	I-Application
.	O
</s>
<s>
Van	O
Rossum	O
based	O
Rietveld	B-Language
on	O
the	O
experience	O
he	O
had	O
writing	O
Mondrian	O
.	O
</s>
<s>
Mondrian	O
was	O
a	O
proprietary	O
application	O
used	O
internally	O
by	O
Google	B-Application
to	O
review	O
their	O
code	O
.	O
</s>
<s>
Gerrit	B-Language
is	O
a	O
fork	B-Application
of	O
Rietveld	B-Language
started	O
because	O
ACL	O
patches	O
would	O
not	O
get	O
integrated	O
into	O
Rietveld	B-Language
.	O
</s>
<s>
Rietveld	B-Language
was	O
named	O
by	O
its	O
author	O
Guido	O
van	O
Rossum	O
after	O
Gerrit	B-Language
Rietveld	B-Language
,	O
who	O
was	O
"	O
one	O
of	O
 [ Rossum's ] 	O
favorite	O
Dutch	O
architects	O
and	O
the	O
designer	O
of	O
the	O
Zig-Zag	O
chair.	O
"	O
</s>
