<s>
Tarsnap	B-General_Concept
is	O
a	O
secure	O
online	O
backup	O
service	O
for	O
UNIX-like	O
operating	O
systems	O
,	O
including	O
BSD	B-Operating_System
,	O
Linux	B-Application
,	O
and	O
OS	B-Operating_System
X	I-Operating_System
.	O
</s>
<s>
Tarsnap	B-General_Concept
encrypts	O
data	O
,	O
and	O
then	O
stores	O
it	O
on	O
Amazon	B-General_Concept
S3	I-General_Concept
.	O
</s>
