<s>
Gensim	B-Application
is	O
an	O
open-source	B-Application
library	O
for	O
unsupervised	O
topic	O
modeling	O
,	O
document	B-Library
indexing	I-Library
,	O
retrieval	O
by	O
similarity	O
,	O
and	O
other	O
natural	B-Language
language	I-Language
processing	I-Language
functionalities	O
,	O
using	O
modern	O
statistical	O
machine	O
learning	O
.	O
</s>
<s>
Gensim	B-Application
is	O
implemented	O
in	O
Python	B-Language
and	O
Cython	B-Application
for	O
performance	O
.	O
</s>
<s>
Gensim	B-Application
is	O
designed	O
to	O
handle	O
large	O
text	O
collections	O
using	O
data	O
streaming	O
and	O
incremental	O
online	O
algorithms	O
,	O
which	O
differentiates	O
it	O
from	O
most	O
other	O
machine	O
learning	O
software	O
packages	O
that	O
target	O
only	O
in-memory	O
processing	O
.	O
</s>
<s>
Gensim	B-Application
includes	O
streamed	O
parallelized	O
implementations	O
of	O
fastText	B-Application
,	O
word2vec	B-Algorithm
and	O
doc2vec	O
algorithms	O
,	O
as	O
well	O
as	O
latent	O
semantic	O
analysis	O
(	O
LSA	O
,	O
LSI	O
,	O
SVD	O
)	O
,	O
non-negative	O
matrix	O
factorization	O
(	O
NMF	O
)	O
,	O
latent	O
Dirichlet	O
allocation	O
(	O
LDA	O
)	O
,	O
tf-idf	O
and	O
random	B-Algorithm
projections	I-Algorithm
.	O
</s>
<s>
Some	O
of	O
the	O
novel	O
online	O
algorithms	O
in	O
Gensim	B-Application
were	O
also	O
published	O
in	O
the	O
2011	O
PhD	O
dissertation	O
Scalability	O
of	O
Semantic	O
Analysis	O
in	O
Natural	B-Language
Language	I-Language
Processing	I-Language
of	O
Radim	O
Řehůřek	O
,	O
the	O
creator	O
of	O
Gensim	B-Application
.	O
</s>
<s>
Gensim	B-Application
has	O
been	O
used	O
and	O
cited	O
in	O
over	O
1400	O
commercial	O
and	O
academic	O
applications	O
as	O
of	O
2018	O
,	O
in	O
a	O
diverse	O
array	O
of	O
disciplines	O
from	O
medicine	O
to	O
insurance	O
claim	O
analysis	O
to	O
patent	O
search	O
.	O
</s>
<s>
The	O
open	B-Application
source	I-Application
code	I-Application
is	O
developed	O
and	O
hosted	O
on	O
GitHub	B-Application
and	O
a	O
public	O
support	O
forum	O
is	O
maintained	O
on	O
Google	B-Application
Groups	I-Application
and	O
Gitter	B-Protocol
.	O
</s>
<s>
Gensim	B-Application
is	O
commercially	O
supported	O
by	O
the	O
company	O
rare-technologies.com,	O
who	O
also	O
provide	O
student	O
mentorships	O
and	O
academic	O
thesis	O
projects	O
for	O
Gensim	B-Application
via	O
their	O
Student	O
Incubator	O
programme	O
.	O
</s>
