<s>
Exercism	B-Protocol
is	O
an	O
online	O
,	O
open-source	B-License
,	O
free	O
coding	O
platform	O
that	O
offers	O
code	O
practice	O
and	O
mentorship	O
on	O
62	O
different	O
programming	O
languages	O
.	O
</s>
<s>
Software	O
developer	O
Katrina	O
Owen	O
created	O
Exercism	B-Protocol
while	O
she	O
was	O
teaching	O
programming	O
at	O
Jumpstart	O
Labs	O
.	O
</s>
<s>
Exercism	B-Protocol
has	O
tracks	O
for	O
62	O
different	O
programming	O
languages	O
.	O
</s>
<s>
The	O
Exercism	B-Protocol
codebase	O
is	O
open	B-License
source	I-License
,	O
consisting	O
of	O
over	O
50	O
repositories	O
,	O
containing	O
website	O
code	O
,	O
API	O
code	O
,	O
command-line	O
code	O
and	O
over	O
40	O
stand-alone	O
repositories	O
for	O
different	O
language	O
tracks	O
.	O
</s>
<s>
Exercism	B-Protocol
has	O
3,500	O
contributors	O
and	O
11,500	O
mentors	O
.	O
</s>
