<s>
Amazon	B-Operating_System
Simple	I-Operating_System
Queue	I-Operating_System
Service	I-Operating_System
(	O
Amazon	B-Operating_System
SQS	I-Operating_System
)	O
is	O
a	O
distributed	O
message	B-General_Concept
queuing	I-General_Concept
service	I-General_Concept
introduced	O
by	O
Amazon.com	B-Application
as	O
a	O
beta	O
in	O
late	O
2004	O
,	O
and	O
generally	O
available	O
in	O
mid	O
2006	O
.	O
</s>
<s>
SQS	O
is	O
intended	O
to	O
provide	O
a	O
highly	O
scalable	O
hosted	O
message	B-Operating_System
queue	I-Operating_System
that	O
resolves	O
issues	O
arising	O
from	O
the	O
common	O
producer	O
–	O
consumer	O
problem	O
or	O
connectivity	O
between	O
producer	O
and	O
consumer	O
.	O
</s>
<s>
Amazon	B-Operating_System
SQS	I-Operating_System
can	O
be	O
described	O
as	O
commoditization	O
of	O
the	O
messaging	O
service	O
.	O
</s>
<s>
Well-known	O
examples	O
of	O
messaging	O
service	O
technologies	O
include	O
IBM	B-Application
WebSphere	I-Application
MQ	I-Application
and	O
Microsoft	B-Application
Message	I-Application
Queuing	I-Application
.	O
</s>
<s>
Amazon	B-Application
does	O
it	O
for	O
them	O
and	O
sells	O
the	O
SQS	O
service	O
at	O
a	O
per-use	O
rate	O
.	O
</s>
<s>
Amazon	B-Application
provides	O
SDKs	O
in	O
several	O
programming	O
languages	O
including	O
Java	B-Language
,	O
Ruby	B-Language
,	O
Python	B-Language
,	O
.NET	B-Application
,	O
PHP	B-Application
,	O
Go	B-Application
and	O
JavaScript	B-Language
.	O
</s>
<s>
A	O
Java	B-Language
Message	I-Language
Service	I-Language
(	O
JMS	O
)	O
1.1	O
client	O
for	O
Amazon	B-Operating_System
SQS	I-Operating_System
was	O
released	O
in	O
December	O
2014	O
.	O
</s>
<s>
Amazon	B-Operating_System
SQS	I-Operating_System
provides	O
authentication	O
procedures	O
to	O
allow	O
for	O
secure	O
handling	O
of	O
data	O
.	O
</s>
<s>
Amazon	B-Application
uses	O
its	O
Amazon	B-Application
Web	I-Application
Services	I-Application
(	O
AWS	B-Application
)	O
identification	O
to	O
do	O
this	O
,	O
requiring	O
users	O
to	O
have	O
an	O
AWS	B-Application
enabled	O
account	O
with	O
Amazon.com	B-Application
.	O
</s>
<s>
AWS	B-Application
assigns	O
a	O
pair	O
of	O
related	O
identifiers	O
,	O
your	O
AWS	B-Application
access	O
keys	O
,	O
to	O
an	O
AWS	B-Application
enabled	O
account	O
to	O
perform	O
identification	O
.	O
</s>
<s>
This	O
key	O
is	O
included	O
in	O
an	O
AWS	B-Application
service	O
request	O
to	O
identify	O
the	O
user	O
.	O
</s>
<s>
If	O
the	O
user	O
is	O
not	O
using	O
SOAP	B-Protocol
with	O
WS-Security	O
,	O
a	O
digital	O
signature	O
is	O
calculated	O
using	O
the	O
Secret	O
Access	O
Key	O
.	O
</s>
<s>
AWS	B-Application
uses	O
the	O
Access	O
Key	O
ID	O
provided	O
in	O
a	O
service	O
request	O
to	O
look	O
up	O
an	O
account	O
's	O
Secret	O
Access	O
Key	O
.	O
</s>
<s>
Amazon.com	B-Application
then	O
calculates	O
a	O
digital	O
signature	O
with	O
the	O
key	O
.	O
</s>
<s>
Amazon	B-Operating_System
SQS	I-Operating_System
guarantees	O
at-least-once	O
delivery	O
.	O
</s>
<s>
,	O
Amazon	B-Operating_System
SQS	I-Operating_System
does	O
not	O
guarantee	O
that	O
the	O
recipient	O
will	O
receive	O
the	O
messages	O
in	O
the	O
order	O
they	O
were	O
sent	O
by	O
the	O
sender	O
.	O
</s>
<s>
A	O
large	O
message	O
can	O
be	O
split	O
into	O
multiple	O
segments	O
that	O
are	O
sent	O
separately	O
,	O
or	O
the	O
message	O
data	O
can	O
be	O
stored	O
using	O
Amazon	B-General_Concept
Simple	I-General_Concept
Storage	I-General_Concept
Service	I-General_Concept
(	O
Amazon	B-General_Concept
S3	I-General_Concept
)	O
or	O
Amazon	B-Application
DynamoDB	I-Application
with	O
just	O
a	O
pointer	O
to	O
the	O
data	O
transmitted	O
in	O
the	O
SQS	O
message	O
.	O
</s>
<s>
Amazon	B-Application
has	O
made	O
an	O
Extended	O
Client	O
Library	O
available	O
for	O
this	O
purpose	O
.	O
</s>
<s>
Dropbox	B-Application
,	O
Netflix	O
and	O
Nextdoor	O
are	O
examples	O
of	O
companies	O
that	O
use	O
SQS	O
extensively	O
.	O
</s>
<s>
SQS	O
is	O
also	O
widely	O
used	O
within	O
Amazon.com	B-Application
.	O
</s>
