<s>
LZX	B-Device
is	O
an	O
LZ77	O
family	O
compression	B-General_Concept
algorithm	I-General_Concept
,	O
a	O
slightly	O
improved	O
version	O
of	O
DEFLATE	B-Algorithm
.	O
</s>
<s>
It	O
is	O
also	O
the	O
name	O
of	O
a	O
file	B-General_Concept
archiver	I-General_Concept
with	O
the	O
same	O
name	O
.	O
</s>
<s>
LZX	B-Device
was	O
publicly	O
released	O
as	O
an	O
Amiga	B-Device
file	B-General_Concept
archiver	I-General_Concept
in	O
1995	O
,	O
while	O
the	O
authors	O
were	O
studying	O
at	O
the	O
University	O
of	O
Waterloo	O
in	O
Canada	O
.	O
</s>
<s>
The	O
software	O
was	O
shareware	B-License
,	O
which	O
was	O
common	O
for	O
compression	B-General_Concept
software	I-General_Concept
at	O
the	O
time	O
.	O
</s>
<s>
In	O
1996	O
,	O
Forbes	O
went	O
to	O
work	O
for	O
Microsoft	O
,	O
and	O
Microsoft	O
's	O
cabinet	O
archiver	O
was	O
enhanced	O
to	O
include	O
the	O
LZX	B-Device
compression	B-General_Concept
method	O
.	O
</s>
<s>
Improvements	O
included	O
a	O
variable	O
search	O
window	O
size	O
;	O
Amiga	B-Device
LZX	B-Device
was	O
fixed	O
to	O
64KB	O
,	O
Microsoft	O
LZX	B-Device
could	O
range	O
on	O
powers	O
of	O
two	O
between	O
32	O
and	O
2048	O
kilobytes	O
(	O
32,768	O
to	O
2,097,152	O
bytes	O
)	O
.	O
</s>
<s>
A	O
special	O
preprocessor	B-General_Concept
was	O
added	O
to	O
detect	O
Intel	B-Operating_System
80x86	I-Operating_System
"	O
CALL	O
"	O
instructions	O
,	O
converting	O
their	O
operands	O
from	O
relative	O
addressing	O
to	O
absolute	O
addressing	O
,	O
thus	O
calls	O
to	O
the	O
same	O
location	O
resulted	O
in	O
repeated	O
strings	O
that	O
the	O
compressor	O
could	O
match	O
,	O
improving	O
compression	B-General_Concept
of	O
80x86	B-Operating_System
binary	O
code	O
.	O
</s>
<s>
When	O
Microsoft	O
introduced	O
Microsoft	B-Protocol
Compressed	I-Protocol
HTML	I-Protocol
Help	I-Protocol
,	O
the	O
replacement	O
to	O
their	O
classic	O
Help	O
file	O
format	O
,	O
they	O
chose	O
to	O
compress	O
all	O
of	O
the	O
HTML	O
data	O
with	O
the	O
LZX	B-Device
algorithm	O
.	O
</s>
<s>
Microsoft	O
LIT	B-Operating_System
files	I-Operating_System
for	O
Microsoft	B-Operating_System
Reader	I-Operating_System
are	O
simply	O
an	O
extension	O
of	O
the	O
CHM	B-Protocol
file	O
format	O
,	O
and	O
thus	O
also	O
use	O
LZX	B-Device
compression	B-General_Concept
.	O
</s>
<s>
Windows	O
Imaging	O
Format	O
,	O
the	O
installation/drive	O
image	O
file	O
format	O
of	O
Windows	B-Application
Vista	I-Application
and	O
Windows	B-Device
7	I-Device
,	O
uses	O
LZX	B-Device
as	O
one	O
of	O
the	O
compression	B-General_Concept
methods	O
.	O
</s>
<s>
In	O
Windows	B-Operating_System
10	I-Operating_System
,	O
LZX	B-Device
compression	B-General_Concept
from	O
Windows	O
Imaging	O
Format	O
is	O
used	O
for	O
new	O
CompactOS	O
NTFS	O
file	B-General_Concept
compression	I-General_Concept
.	O
</s>
<s>
Microsoft	O
uses	O
LZX	B-Device
compression	B-General_Concept
on	O
Xbox	B-Device
Live	I-Device
Avatars	I-Device
to	O
reduce	O
their	O
disk	O
and	O
bandwidth	O
requirements	O
.	O
</s>
<s>
The	O
unlzx	O
program	O
and	O
XAD	B-Application
can	O
unpack	O
Amiga	B-Device
LZX	B-Device
archives	O
.	O
</s>
<s>
The	O
cabextract	O
program	O
can	O
unpack	O
Microsoft	O
cabinet	O
files	O
using	O
the	O
LZX	B-Device
method	O
.	O
</s>
<s>
There	O
are	O
a	O
multitude	O
of	O
cross-platform	O
tools	O
for	O
decompiling	O
or	O
viewing	O
CHM	B-Protocol
files	O
,	O
as	O
stated	O
in	O
the	O
CHM	B-Protocol
article	O
.	O
</s>
<s>
LIT	B-Operating_System
files	I-Operating_System
can	O
be	O
unpacked	O
using	O
the	O
Convert	O
LIT	O
software	O
.	O
</s>
