<s>
SourcePuller	B-Language
is	O
an	O
open-source	B-License
client	O
for	O
accessing	O
the	O
BitKeeper	B-Protocol
version	B-Architecture
control	I-Architecture
system	I-Architecture
.	O
</s>
<s>
It	O
was	O
originally	O
developed	O
by	O
Andrew	O
Tridgell	O
,	O
who	O
reverse	O
engineered	O
the	O
BitKeeper	B-Protocol
protocol	O
.	O
</s>
<s>
While	O
not	O
widely	O
used	O
itself	O
,	O
it	O
is	O
best	O
known	O
for	O
triggering	O
the	O
BitKeeper	B-Protocol
controversy	O
,	O
which	O
sparked	O
the	O
switch	O
of	O
the	O
Linux	B-Operating_System
kernel	I-Operating_System
from	O
BitKeeper	B-Protocol
to	O
Git	B-Application
.	O
</s>
