<s>
Grav	B-Language
is	O
a	O
free	B-Application
software	I-Application
,	O
self-hosted	O
content	B-Protocol
management	I-Protocol
system	I-Protocol
(	O
CMS	O
)	O
written	O
in	O
the	O
PHP	B-Application
programming	I-Application
language	I-Application
and	O
based	O
on	O
the	O
Symfony	B-Language
web	B-Application
application	I-Application
framework	I-Application
.	O
</s>
<s>
It	O
uses	O
a	O
flat	B-Application
file	I-Application
database	I-Application
for	O
both	O
backend	O
and	O
frontend	O
.	O
</s>
<s>
Grav	B-Language
is	O
designed	O
to	O
have	O
a	O
shallow	O
learning	O
curve	O
,	O
and	O
to	O
be	O
easy	O
to	O
set	O
up	O
.	O
</s>
<s>
The	O
focus	O
of	O
Grav	B-Language
is	O
speed	O
and	O
simplicity	O
,	O
rather	O
than	O
an	O
abundance	O
of	O
built-in	O
features	O
that	O
come	O
at	O
the	O
expense	O
of	O
complexity	O
.	O
</s>
<s>
The	O
name	O
Grav	B-Language
is	O
a	O
shortened	O
version	O
of	O
the	O
word	O
"	O
gravity	O
"	O
.	O
</s>
<s>
Grav	B-Language
is	O
the	O
most	O
starred	O
PHP	B-Application
CMS	O
on	O
GitHub	B-Application
,	O
with	O
over	O
13,700	O
stars	O
.	O
</s>
