<s>
CatBoost	B-Language
is	O
an	O
open-source	B-Application
software	I-Application
library	O
developed	O
by	O
Yandex	O
.	O
</s>
<s>
It	O
provides	O
a	O
gradient	B-Algorithm
boosting	I-Algorithm
framework	O
which	O
among	O
other	O
features	O
attempts	O
to	O
solve	O
for	O
Categorical	O
features	O
using	O
a	O
permutation	O
driven	O
alternative	O
compared	O
to	O
the	O
classical	O
algorithm	O
.	O
</s>
<s>
Python	B-Language
,	O
</s>
<s>
R	B-Language
,	O
and	O
models	O
built	O
using	O
catboost	B-Language
can	O
be	O
used	O
for	O
predictions	O
in	O
C++	B-Language
,	O
Java	B-Language
,	O
C#	B-Application
,	O
Rust	B-Application
,	O
Core	O
ML	O
,	O
ONNX	B-Application
,	O
and	O
PMML	B-Application
.	O
</s>
<s>
The	O
source	O
code	O
is	O
licensed	O
under	O
Apache	B-Application
License	I-Application
and	O
available	O
on	O
GitHub	O
.	O
</s>
<s>
InfoWorld	O
magazine	O
awarded	O
the	O
library	O
"	O
The	O
best	O
machine	O
learning	O
tools	O
"	O
in	O
2017	O
.	O
along	O
with	O
TensorFlow	B-Language
,	O
Pytorch	B-Algorithm
,	O
XGBoost	B-Language
and	O
8	O
other	O
libraries	O
.	O
</s>
<s>
Kaggle	B-Application
listed	O
CatBoost	B-Language
as	O
one	O
of	O
the	O
most	O
frequently	O
used	O
Machine	O
Learning	O
(	O
ML	O
)	O
frameworks	O
in	O
the	O
world	O
.	O
</s>
<s>
In	O
2009	O
Andrey	O
Gulin	O
,	O
developed	O
MatrixNet	B-Application
,	O
a	O
proprietary	O
gradient	B-Algorithm
boosting	I-Algorithm
library	O
that	O
was	O
used	O
in	O
Yandex	O
to	O
rank	O
search	O
results	O
.	O
</s>
<s>
Since	O
2009	O
MatrixNet	B-Application
has	O
been	O
used	O
in	O
different	O
projects	O
in	O
Yandex	O
,	O
including	O
recommendation	O
systems	O
and	O
weather	O
prediction	O
.	O
</s>
<s>
It	O
resulted	O
in	O
several	O
proprietary	O
Gradient	B-Algorithm
Boosting	I-Algorithm
libraries	O
with	O
different	O
approaches	O
to	O
handling	O
categorical	O
data	O
.	O
</s>
<s>
In	O
2016	O
Machine	O
Learning	O
Infrastructure	O
team	O
led	O
by	O
Anna	O
Dorogush	O
started	O
working	O
on	O
Gradient	B-Algorithm
Boosting	I-Algorithm
in	O
Yandex	O
,	O
including	O
Matrixnet	B-Application
and	O
Tensornet	O
.	O
</s>
<s>
They	O
implemented	O
and	O
open-sourced	O
the	O
next	O
version	O
of	O
Gradient	B-Algorithm
Boosting	I-Algorithm
library	O
called	O
CatBoost	B-Language
,	O
which	O
has	O
support	O
of	O
categorical	O
and	O
text	O
data	O
,	O
GPU	O
training	O
,	O
model	O
analysis	O
,	O
visualisation	O
tools	O
.	O
</s>
<s>
CatBoost	B-Language
was	O
open-sourced	O
in	O
July	O
2017	O
and	O
is	O
under	O
active	O
development	O
in	O
Yandex	O
and	O
the	O
open-source	B-Application
community	O
.	O
</s>
