<s>
purplera1n	B-Operating_System
was	O
a	O
utility	O
that	O
jailbreaks	B-Application
version	O
3.0	O
of	O
the	O
iPhone	B-Operating_System
OS	I-Operating_System
.	O
</s>
<s>
It	O
allowed	O
users	O
to	O
install	O
either	O
Cydia	B-Device
or	O
Rock	O
App	O
,	O
a	O
Cydia	B-Device
alternative	O
.	O
</s>
<s>
This	O
allowed	O
the	O
user	O
to	O
gain	O
access	O
to	O
the	O
root	B-Application
directory	I-Application
and	O
file	B-Application
system	I-Application
.	O
</s>
<s>
By	O
gaining	O
access	O
to	O
those	O
,	O
users	O
could	O
install	O
themes	O
,	O
tweaks	O
and	O
other	O
homebrew	B-Application
applications	O
.	O
</s>
<s>
Purplera1n	B-Operating_System
was	O
superseded	O
by	O
blackra1n	B-Operating_System
.	O
</s>
