<s>
The	O
.ac	B-General_Concept
top-level	O
domain	O
is	O
the	O
Internet	B-Application
country	I-Application
code	I-Application
(	O
ccTLD	B-Application
)	O
for	O
Saint	O
Helena	O
,	O
Ascension	O
and	O
Tristan	O
da	O
Cunha	O
,	O
used	O
primarily	O
for	O
Ascension	O
Island	O
(	O
Saint	O
Helena	O
has	O
its	O
own	O
ccTLD	B-Application
,	O
.sh	B-General_Concept
)	O
.	O
</s>
<s>
The	O
registry	O
accepts	O
registrations	O
of	O
internationalized	B-Language
domain	I-Language
names	I-Language
.	O
</s>
<s>
Due	O
to	O
its	O
similarity	O
to	O
the	O
.ac	B-General_Concept
(	O
"	O
academic	O
"	O
)	O
second-level	O
domain	O
that	O
exists	O
under	O
some	O
country	B-Application
code	I-Application
top-level	I-Application
domains	I-Application
,	O
some	O
educational	O
institutions	O
also	O
register	O
under	O
the	O
.ac	B-General_Concept
top-level	O
domain	O
:	O
</s>
<s>
On	O
10	O
December	O
2013	O
,	O
The	B-Application
Pirate	I-Application
Bay	I-Application
switched	O
to	O
an	O
.ac	B-General_Concept
domain	O
.	O
</s>
<s>
.ac	B-General_Concept
is	O
being	O
used	O
by	O
anti-cheat	O
software	O
Easy	O
Anti-Cheat	O
.	O
</s>
<s>
.ac	B-General_Concept
is	O
occasionally	O
used	O
as	O
an	O
abbreviation	O
for	O
activities	O
and/or	O
accommodation	O
by	O
tourism	O
websites	O
.	O
</s>
