<s>
In	O
computing	O
,	O
Deflate	B-Algorithm
(	O
stylized	O
as	O
DEFLATE	B-Algorithm
)	O
is	O
a	O
lossless	B-Algorithm
data	I-Algorithm
compression	I-Algorithm
file	O
format	O
that	O
uses	O
a	O
combination	O
of	O
LZ77	O
and	O
Huffman	B-General_Concept
coding	I-General_Concept
.	O
</s>
<s>
It	O
was	O
designed	O
by	O
Phil	O
Katz	O
,	O
for	O
version	O
2	O
of	O
his	O
PKZIP	B-Application
archiving	O
tool	O
.	O
</s>
<s>
Deflate	B-Algorithm
was	O
later	O
specified	O
in	O
RFC	O
1951	O
(	O
1996	O
)	O
.	O
</s>
<s>
Katz	O
also	O
designed	O
the	O
original	O
algorithm	O
used	O
to	O
construct	O
Deflate	B-Algorithm
streams	O
.	O
</s>
<s>
This	O
algorithm	O
was	O
patented	O
as	O
,	O
and	O
assigned	O
to	O
PKWARE	O
,	O
Inc	O
.	O
As	O
stated	O
in	O
the	O
RFC	O
document	O
,	O
an	O
algorithm	O
producing	O
Deflate	B-Algorithm
files	O
was	O
widely	O
thought	O
to	O
be	O
implementable	O
in	O
a	O
manner	O
not	O
covered	O
by	O
patents	O
.	O
</s>
<s>
This	O
led	O
to	O
its	O
widespread	O
use	O
–	O
for	O
example	O
,	O
in	O
gzip	B-Application
compressed	O
files	O
and	O
PNG	O
image	O
files	O
,	O
in	O
addition	O
to	O
the	O
ZIP	B-General_Concept
file	I-General_Concept
format	I-General_Concept
for	O
which	O
Katz	O
originally	O
designed	O
it	O
.	O
</s>
<s>
A	O
Deflate	B-Algorithm
stream	O
consists	O
of	O
a	O
series	O
of	O
blocks	O
.	O
</s>
<s>
Most	O
compressible	O
data	O
will	O
end	O
up	O
being	O
encoded	O
using	O
method	O
10	O
,	O
the	O
dynamic	O
Huffman	B-General_Concept
encoding	I-General_Concept
,	O
which	O
produces	O
an	O
optimized	O
Huffman	B-General_Concept
tree	I-General_Concept
customized	O
for	O
each	O
block	O
of	O
data	O
individually	O
.	O
</s>
<s>
Instructions	O
to	O
generate	O
the	O
necessary	O
Huffman	B-General_Concept
tree	I-General_Concept
immediately	O
follow	O
the	O
block	O
header	O
.	O
</s>
<s>
Relative	O
back-references	O
can	O
be	O
made	O
across	O
any	O
number	O
of	O
blocks	O
,	O
as	O
long	O
as	O
the	O
distance	O
appears	O
within	O
the	O
last	O
32KiB	O
of	O
uncompressed	B-General_Concept
data	O
decoded	O
(	O
termed	O
the	O
sliding	O
window	O
)	O
.	O
</s>
<s>
Searching	O
the	O
preceding	O
text	O
for	O
duplicate	O
substrings	O
is	O
the	O
most	O
computationally	O
expensive	O
part	O
of	O
the	O
DEFLATE	B-Algorithm
algorithm	O
,	O
and	O
the	O
operation	O
which	O
compression	O
level	O
settings	O
affect	O
.	O
</s>
<s>
The	O
method	O
used	O
is	O
Huffman	B-General_Concept
coding	I-General_Concept
which	O
creates	O
an	O
unprefixed	O
tree	O
of	O
non-overlapping	O
intervals	O
,	O
where	O
the	O
length	O
of	O
each	O
sequence	O
is	O
inversely	O
proportional	O
to	O
the	O
logarithm	O
of	O
the	O
probability	O
of	O
that	O
symbol	O
needing	O
to	O
be	O
encoded	O
.	O
</s>
<s>
The	O
two	O
codes	O
(	O
the	O
288-symbol	O
length/literal	O
tree	O
and	O
the	O
32-symbol	O
distance	O
tree	O
)	O
are	O
themselves	O
encoded	O
as	O
canonical	B-Algorithm
Huffman	I-Algorithm
codes	I-Algorithm
by	O
giving	O
the	O
bit	O
length	O
of	O
the	O
code	O
for	O
each	O
symbol	O
.	O
</s>
<s>
The	O
bit	O
lengths	O
are	O
themselves	O
run-length	B-Algorithm
encoded	I-Algorithm
to	O
produce	O
as	O
compact	O
a	O
representation	O
as	O
possible	O
.	O
</s>
<s>
As	O
an	O
alternative	O
to	O
including	O
the	O
tree	O
representation	O
,	O
the	O
"	O
static	O
tree	O
"	O
option	O
provides	O
standard	O
fixed	O
Huffman	B-General_Concept
trees	I-General_Concept
.	O
</s>
<s>
The	O
zlib/gzip	O
reference	O
implementation	O
allows	O
the	O
user	O
to	O
select	O
from	O
a	O
sliding	O
scale	O
of	O
likely	O
resulting	O
compression-level	O
vs.	O
speed	O
of	O
encoding	O
.	O
</s>
<s>
Options	O
range	O
from	O
0	O
(	O
do	O
not	O
attempt	O
compression	O
,	O
just	O
store	O
uncompressed	B-General_Concept
)	O
to	O
9	O
representing	O
the	O
maximum	O
capability	O
of	O
the	O
reference	O
implementation	O
in	O
zlib/gzip	O
.	O
</s>
<s>
Other	O
Deflate	B-Algorithm
encoders	O
have	O
been	O
produced	O
,	O
all	O
of	O
which	O
will	O
also	O
produce	O
a	O
compatible	O
bitstream	O
capable	O
of	O
being	O
decompressed	O
by	O
any	O
existing	O
Deflate	B-Algorithm
decoder	O
.	O
</s>
<s>
The	O
focus	O
with	O
non-zlib	O
versions	O
of	O
an	O
encoder	O
has	O
normally	O
been	O
to	O
produce	O
a	O
more	O
efficiently	O
compressed	O
and	O
smaller	O
encoded	O
stream	O
.	O
</s>
<s>
Deflate64	O
,	O
specified	O
by	O
PKWARE	O
,	O
is	O
a	O
proprietary	O
variant	O
of	O
Deflate	B-Algorithm
.	O
</s>
<s>
This	O
leads	O
to	O
Deflate64	O
having	O
a	O
longer	O
compression	O
time	O
,	O
and	O
potentially	O
a	O
slightly	O
higher	O
compression	O
ratio	O
,	O
than	O
Deflate	B-Algorithm
.	O
</s>
<s>
Several	O
free	O
and/or	O
open	O
source	O
projects	O
support	O
Deflate64	O
,	O
such	O
as	O
7-Zip	B-Language
,	O
while	O
others	O
,	O
such	O
as	O
zlib	B-Language
,	O
do	O
not	O
,	O
as	O
a	O
result	O
of	O
the	O
proprietary	O
nature	O
of	O
the	O
procedure	O
and	O
the	O
very	O
modest	O
performance	O
increase	O
over	O
Deflate	B-Algorithm
.	O
</s>
<s>
Implementations	O
of	O
Deflate	B-Algorithm
are	O
freely	O
available	O
in	O
many	O
languages	O
.	O
</s>
<s>
Apps	O
written	O
in	O
C	B-Language
typically	O
use	O
the	O
zlib	B-Language
library	O
(	O
under	O
the	O
permissive	O
zlib	B-License
License	I-License
)	O
.	O
</s>
<s>
Apps	O
in	O
Borland	B-Application
Pascal	I-Application
(	O
and	O
compatible	O
languages	O
)	O
can	O
use	O
paszlib	O
.	O
</s>
<s>
Apps	O
in	O
C++	B-Language
can	O
take	O
advantage	O
of	O
the	O
improved	O
Deflate	B-Algorithm
library	O
in	O
7-Zip	B-Language
.	O
</s>
<s>
Both	O
Java	B-Device
and	O
.NET	B-Application
Framework	I-Application
offer	O
out-of-the-box	O
support	O
for	O
Deflate	B-Algorithm
in	O
their	O
libraries	O
(	O
respectively	O
,	O
java.util.zip	O
and	O
)	O
.	O
</s>
<s>
Apps	O
in	O
Ada	B-Language
can	O
use	O
(	O
pure	O
)	O
or	O
.	O
</s>
<s>
zlib	B-Language
:	O
standard	O
reference	O
implementation	O
adopted	O
in	O
many	O
apps	O
because	O
of	O
its	O
open-source	O
,	O
permissive	O
license	O
.	O
</s>
<s>
Crypto++	B-Language
:	O
contains	O
a	O
public-domain	O
implementation	O
in	O
C++	B-Language
aimed	O
at	O
reducing	O
potential	O
security	O
vulnerabilities	O
.	O
</s>
<s>
The	O
author	O
,	O
Wei	O
Dai	O
states	O
"	O
This	O
code	O
is	O
less	O
clever	O
,	O
but	O
hopefully	O
more	O
understandable	O
and	O
maintainable	O
[	O
than	O
zlib ]	O
"	O
.	O
</s>
<s>
7-Zip	B-Language
:	O
written	O
by	O
Igor	B-Language
Pavlov	I-Language
in	O
C++	B-Language
,	O
this	O
version	O
is	O
freely	O
licensed	O
and	O
achieves	O
higher	O
compression	O
than	O
zlib	B-Language
at	O
the	O
expense	O
of	O
CPU	O
usage	O
.	O
</s>
<s>
Zopfli	B-Application
:	O
C	B-Language
implementation	O
under	O
the	O
Apache	B-Application
License	I-Application
by	O
Google	B-Application
;	O
achieves	O
highest	O
compression	O
at	O
the	O
expense	O
of	O
CPU	O
usage	O
.	O
</s>
<s>
ZopfliPNG	O
is	O
a	O
variation	O
of	O
Zopfli	B-Application
for	O
use	O
with	O
PNG	O
files	O
.	O
</s>
<s>
igzip	O
:	O
an	O
encoder	O
written	O
in	O
the	O
x86	B-Language
assembly	I-Language
language	I-Language
,	O
released	O
by	O
Intel	O
under	O
the	B-License
MIT	I-License
License	I-License
.	O
</s>
<s>
3x	O
faster	O
than	O
zlib	B-Language
-1	O
.	O
</s>
<s>
AdvanceCOMP	O
uses	O
the	O
higher	O
compression	O
ratio	O
versions	O
of	O
Deflate	B-Algorithm
in	O
7-Zip	B-Language
,	O
libdeflate	O
,	O
and	O
Zopfli	B-Application
to	O
enable	O
recompression	O
of	O
gzip	B-Application
,	O
PNG	O
,	O
MNG	O
and	O
ZIP	B-General_Concept
files	I-General_Concept
with	O
the	O
possibility	O
of	O
smaller	O
file	O
sizes	O
than	O
zlib	B-Language
is	O
able	O
to	O
achieve	O
at	O
maximum	O
settings	O
.	O
</s>
<s>
Comtech	O
produced	O
a	O
PCI-X	O
card	O
(	O
PCI-ID	O
:	O
193f:0001	O
)	O
capable	O
of	O
compressing	O
streams	O
using	O
Deflate	B-Algorithm
at	O
a	O
rate	O
of	O
up	O
to	O
3.0Gbit/s	O
(	O
375MB/s	O
)	O
for	O
incoming	O
uncompressed	B-General_Concept
data	O
.	O
</s>
<s>
Accompanying	O
the	O
Linux	B-Operating_System
kernel	I-Operating_System
driver	B-Application
for	O
the	O
AHA361-PCIX	O
is	O
an	O
"	O
ahagzip	O
"	O
utility	O
and	O
customised	O
"	O
mod_deflate_aha	O
"	O
capable	O
of	O
using	O
the	O
hardware	O
compression	O
from	O
Apache	B-Application
.	O
</s>
<s>
The	O
hardware	O
is	O
based	O
on	O
a	O
Xilinx	B-General_Concept
Virtex	I-General_Concept
FPGA	B-Architecture
and	O
four	O
custom	O
AHA3601	O
ASICs	O
.	O
</s>
<s>
The	O
AHA361/AHA362	O
boards	O
are	O
limited	O
to	O
only	O
handling	O
static	O
Huffman	O
blocks	O
and	O
require	O
software	O
to	O
be	O
modified	O
to	O
add	O
support	O
—	O
the	O
cards	O
were	O
not	O
able	O
to	O
support	O
the	O
full	O
Deflate	B-Algorithm
specification	O
,	O
meaning	O
they	O
could	O
only	O
reliably	O
decode	O
their	O
own	O
output	O
(	O
a	O
stream	O
that	O
did	O
not	O
contain	O
any	O
dynamic	O
Huffman	O
type	O
2	O
blocks	O
)	O
.	O
</s>
<s>
This	O
is	O
a	O
range	O
of	O
PCI	B-Protocol
(	O
PCI-ID	O
:	O
17b4:0011	O
)	O
or	O
PCI-X	O
cards	O
featuring	O
between	O
one	O
and	O
six	O
compression	O
engines	O
with	O
claimed	O
processing	O
speeds	O
of	O
up	O
to	O
3.6Gbit/s	O
(	O
450MB/s	O
)	O
.	O
</s>
<s>
In	O
2008	O
,	O
Comtech	O
started	O
producing	O
two	O
PCIe	O
cards	O
(	O
PCI-ID	O
:	O
193f:0363/193f:0364	O
)	O
with	O
a	O
new	O
hardware	O
AHA3610	O
encoder	O
chip	O
.	O
</s>
<s>
Using	O
two	O
of	O
these	O
chips	O
,	O
the	O
AHA363-PCIe	O
board	O
can	O
process	O
Deflate	B-Algorithm
at	O
a	O
rate	O
of	O
up	O
to	O
5.0Gbit/s	O
(	O
625MB/s	O
)	O
using	O
the	O
two	O
channels	O
(	O
two	O
compression	O
and	O
two	O
decompression	O
)	O
.	O
</s>
<s>
The	O
AHA364-PCIe	O
variant	O
is	O
an	O
encode-only	O
version	O
of	O
the	O
card	O
designed	O
for	O
out-going	O
load	B-Application
balancers	I-Application
and	O
instead	O
has	O
multiple	O
register	O
sets	O
to	O
allow	O
32	O
independent	O
virtual	O
compression	O
channels	O
feeding	O
two	O
physical	O
compression	O
engines	O
.	O
</s>
<s>
Linux	B-Operating_System
,	O
Microsoft	B-Application
Windows	I-Application
,	O
and	O
OpenSolaris	B-Operating_System
kernel	B-Operating_System
device	B-Application
drivers	I-Application
are	O
available	O
for	O
both	O
of	O
the	O
new	O
cards	O
,	O
along	O
with	O
a	O
modified	O
zlib	B-Language
system	O
library	O
so	O
that	O
dynamically	O
linked	O
applications	O
can	O
automatically	O
use	O
the	O
hardware	O
support	O
without	O
internal	O
modification	O
.	O
</s>
<s>
The	O
AHA367-PCIe	O
board	O
(	O
PCI-ID	O
:	O
193f:0367	O
)	O
is	O
similar	O
to	O
the	O
AHA363-PCIe	O
but	O
uses	O
four	O
AHA3610	O
chips	O
for	O
a	O
sustained	O
compression	O
rate	O
of	O
10Gbit/s	O
(	O
1250MB/s	O
)	O
.	O
</s>
<s>
Unlike	O
the	O
AHA362-PCIX	O
,	O
the	O
decompression	O
engines	O
on	O
the	O
AHA363-PCIe	O
and	O
AHA367-PCIe	O
boards	O
are	O
fully	O
deflate	B-Algorithm
compliant	O
.	O
</s>
<s>
and	O
processors	O
from	O
contain	O
high-speed	O
hardware	O
deflate	B-Algorithm
and	O
inflate	O
engines	O
compatible	O
with	O
both	O
ZLIB	B-Language
and	O
GZIP	B-Application
with	O
some	O
devices	O
able	O
to	O
handle	O
multiple	O
simultaneous	O
data	O
streams	O
.	O
</s>
<s>
GPL	B-License
FPGA	B-Architecture
implementation	O
.	O
</s>
<s>
This	O
is	O
a	O
Silicon	O
IP	O
core	O
supporting	O
Deflate	B-Algorithm
,	O
Zlib	B-Language
and	O
Gzip	B-Application
compression	I-Application
.	O
</s>
<s>
ZipAccel-C	O
can	O
be	O
implemented	O
in	O
ASIC	O
or	O
FPGAs	B-Architecture
,	O
supports	O
both	O
Dynamic	O
and	O
Static	O
Huffman	O
tables	O
,	O
and	O
can	O
provide	O
throughputs	O
in	O
excess	O
of	O
100Gbps	O
.	O
</s>
<s>
The	O
company	O
offers	O
compression/decompression	O
accelerator	O
board	O
reference	O
designs	O
for	O
Intel	O
FPGA	B-Architecture
(	O
)	O
and	O
Xilinx	O
FPGAs	B-Architecture
(	O
)	O
.	O
</s>
<s>
Intel	B-Architecture
Communications	I-Architecture
Chipset	I-Architecture
89xx	I-Architecture
Series	I-Architecture
(	O
Cave	O
Creek	O
)	O
for	O
the	O
Intel	B-Device
Xeon	I-Device
E5-2600	O
and	O
E5-2400	O
Processor	O
Series	O
(	O
Sandy	O
Bridge-EP/EN	O
)	O
supports	O
hardware	O
compression	O
and	O
decompression	O
using	O
QuickAssist	O
Technology	O
.	O
</s>
<s>
IBM	B-Device
z15	I-Device
CPUs	O
incorporate	O
an	O
improved	O
version	O
of	O
the	O
Nest	O
Accelerator	O
Unit	O
(	O
NXU	O
)	O
hardware	O
acceleration	O
from	O
the	O
zEDC	O
Express	O
I/O	O
expansion	O
cards	O
used	O
in	O
z14	O
systems	O
for	O
hardware	O
Deflate	B-Algorithm
compression	O
and	O
decompression	O
as	O
specified	O
by	O
RFC1951	O
.	O
</s>
<s>
Beginning	O
with	O
the	O
POWER9	B-Device
architecture	O
,	O
IBM	O
added	O
hardware	O
support	O
for	O
compressing	O
and	O
decompressing	O
Deflate	B-Algorithm
(	O
as	O
specified	O
by	O
RFC	O
1951	O
)	O
to	O
the	O
formerly	O
crypto-centric	O
Nest	O
accelerator	O
(	O
NX	O
)	O
core	O
introduced	O
with	O
POWER7+	B-Device
.	O
</s>
<s>
This	O
support	O
is	O
available	O
to	O
programs	O
running	O
with	O
AIX	B-Application
7.2	O
Technology	O
Level	O
4	O
Expansion	O
Pack	O
or	O
AIX	B-Application
7.2	O
Technology	O
Level	O
5	O
Service	O
Pack	O
2	O
through	O
the	O
zlibNX	O
library	O
.	O
</s>
<s>
Inflate	O
is	O
the	O
decoding	O
process	O
that	O
takes	O
a	O
Deflate	B-Algorithm
bitstream	O
for	O
decompression	O
and	O
correctly	O
produces	O
the	O
original	O
full-size	O
data	O
or	O
file	O
.	O
</s>
<s>
,	O
written	O
by	O
Piotr	O
Fusik	O
in	O
6502	B-General_Concept
assembly	B-Language
language	I-Language
.	O
</s>
<s>
,	O
written	O
by	O
Andrew	O
Collier	O
in	O
Z80	B-General_Concept
assembly	B-Language
language	I-Language
with	O
optional	O
memory	O
paging	O
support	O
for	O
the	O
SAM	B-Device
Coupé	I-Device
,	O
and	O
made	O
available	O
under	O
the	O
BSD/GPL/LGPL/DFSG	O
licenses	O
.	O
</s>
<s>
,	O
written	O
by	O
Laurens	O
Holst	O
in	O
Z80	B-General_Concept
assembly	B-Language
language	I-Language
for	O
the	O
MSX	B-Operating_System
,	O
licensed	O
under	O
BSD	B-Operating_System
.	O
</s>
<s>
,	O
a	O
fast	O
and	O
efficient	O
implementation	O
in	O
M68000	B-Device
machine	O
language	O
,	O
written	O
by	O
Keir	O
Fraser	O
and	O
released	O
into	O
the	O
Public	O
Domain	O
.	O
</s>
<s>
Comes	O
with	O
C	B-Language
source-code	O
under	O
the	O
GNU	B-Application
LGPL	I-Application
license	O
.	O
</s>
<s>
Used	O
in	O
the	B-Application
GIMP	I-Application
installer	O
.	O
</s>
<s>
puff.c	O
(	O
zlib	B-Language
)	O
,	O
a	O
small	O
,	O
unencumbered	O
,	O
single-file	O
reference	O
implementation	O
included	O
in	O
the	O
/contrib/puff	O
directory	O
of	O
the	O
zlib	B-Language
distribution	O
.	O
</s>
<s>
written	O
by	O
Jørgen	O
Ibsen	O
in	O
ANSI	O
C	B-Language
and	O
comes	O
with	O
zlib	B-License
license	I-License
.	O
</s>
<s>
(	O
)	O
,	O
Public	O
domain	O
Inflate	O
implementation	O
contained	O
entirely	O
in	O
a	O
single	O
C	B-Language
function	O
.	O
</s>
<s>
Self-standing	O
Common	B-Language
Lisp	I-Language
decoder	O
distributed	O
with	O
a	O
GNU	B-Application
LGPL	I-Application
license	O
.	O
</s>
<s>
/	O
,	O
a	O
pure-Seed7	O
implementation	O
of	O
Deflate	B-Algorithm
and	O
gzip	B-Application
decompression	O
,	O
by	O
Thomas	O
Mertes	O
.	O
</s>
<s>
Made	O
available	O
under	O
the	O
GNU	B-Application
LGPL	I-Application
license	O
.	O
</s>
<s>
,	O
a	O
pure-Python	O
stand-alone	O
Deflate	B-Algorithm
(	O
gzip	B-Application
)	O
and	O
bzip2	B-Application
decoder	O
by	O
Paul	O
Sladen	O
.	O
</s>
<s>
Written	O
for	O
research/prototyping	O
and	O
made	O
available	O
under	O
the	O
BSD/GPL/LGPL/DFSG	O
licenses	O
.	O
</s>
<s>
,	O
a	O
pure-Lua	O
implementation	O
of	O
Deflate	B-Algorithm
and	O
gzip/zlib	O
decompression	O
,	O
by	O
David	O
Manura	O
.	O
</s>
<s>
:	O
JavaScript	B-Language
speed-optimized	O
port	O
of	O
zlib	B-Language
.	O
</s>
<s>
GPL	B-License
FPGA	B-Architecture
implementation	O
.	O
</s>
<s>
This	O
is	O
a	O
Silicon	O
IP	O
core	O
supporting	O
decompression	O
of	O
Deflate	B-Algorithm
,	O
Zlib	B-Language
and	O
Gzip	B-Application
files	O
.	O
</s>
<s>
The	O
ZipAccel-D	O
IP	O
core	O
that	O
can	O
be	O
implemented	O
in	O
ASIC	O
or	O
FPGAs	B-Architecture
.	I-Architecture
</s>
<s>
The	O
company	O
offers	O
compression/decompression	O
accelerator	O
board	O
reference	O
designs	O
for	O
Intel	O
FPGA	B-Architecture
(	O
)	O
and	O
Xilinx	O
FPGAs	B-Architecture
(	O
)	O
.	O
</s>
<s>
IBM	B-Device
z15	I-Device
CPUs	O
incorporate	O
an	O
improved	O
version	O
of	O
the	O
Nest	O
Accelerator	O
Unit	O
(	O
NXU	O
)	O
hardware	O
acceleration	O
from	O
the	O
zEDC	O
Express	O
I/O	O
expansion	O
cards	O
used	O
in	O
z14	O
systems	O
for	O
hardware	O
Deflate	B-Algorithm
compression	O
and	O
decompression	O
as	O
specified	O
by	O
RFC1951	O
.	O
</s>
<s>
Beginning	O
with	O
the	O
POWER9	B-Device
architecture	O
,	O
IBM	O
added	O
hardware	O
support	O
for	O
compressing	O
and	O
decompressing	O
Deflate	B-Algorithm
(	O
as	O
specified	O
by	O
RFC	O
1951	O
)	O
to	O
the	O
formerly	O
crypto-centric	O
Nest	O
accelerator	O
(	O
NX	O
)	O
core	O
introduced	O
with	O
POWER7+	B-Device
.	O
</s>
<s>
This	O
support	O
is	O
available	O
to	O
programs	O
running	O
with	O
AIX	B-Application
7.2	O
Technology	O
Level	O
4	O
Expansion	O
Pack	O
or	O
AIX	B-Application
7.2	O
Technology	O
Level	O
5	O
Service	O
Pack	O
2	O
through	O
the	O
zlibNX	O
library	O
.	O
</s>
