<s>
TERSE	B-Application
is	O
an	O
IBM	O
archive	O
file	O
format	O
that	O
supports	O
lossless	B-Algorithm
compression	I-Algorithm
.	O
</s>
<s>
A	O
TERSE	B-Application
file	O
may	O
contain	O
a	O
sequential	O
data	O
set	O
,	O
a	O
partitioned	O
data	O
set	O
(	O
PDS	O
)	O
,	O
partitioned	O
data	O
set	O
extended	O
(	O
PDSE	O
)	O
,	O
or	O
a	O
large	O
format	O
dataset	O
(	O
DSNTYPE	O
=	O
LARGE	O
)	O
.	O
</s>
<s>
Terse	B-Application
files	O
are	O
compressed	O
using	O
a	O
modification	O
of	O
Ziv	B-Algorithm
,	I-Algorithm
Lempel	I-Algorithm
compression	I-Algorithm
algorithm	I-Algorithm
developed	O
by	O
Victor	O
S	O
.	O
Miller	O
and	O
Mark	O
Wegman	O
at	O
the	O
Thomas	O
J	O
.	O
Watson	O
Research	O
Center	O
in	O
Yorktown	O
Heights	O
,	O
New	O
York	O
.	O
</s>
<s>
The	O
Terse	B-Application
algorithm	O
was	O
proprietary	O
to	O
IBM	O
;	O
however	O
,	O
IBM	O
has	O
released	O
an	O
open	O
source	O
Java	O
decompressor	O
under	O
the	O
Apache	O
2	O
license	O
.	O
</s>
<s>
The	O
compression/decompression	O
program	O
(	O
called	O
terse	B-Application
and	O
unterse	O
)	O
—	O
AMATERSE	O
or	O
TRSMAIN	O
—	O
is	O
available	O
from	O
IBM	O
for	O
z/OS	B-Application
;	O
the	O
z/VM	B-Application
equivalents	O
are	O
the	O
TERSE	B-Application
and	O
DETERSE	O
commands	O
,	O
for	O
sequential	O
datasets	O
only	O
.	O
</s>
<s>
Versions	O
for	O
PC	B-Operating_System
DOS	I-Operating_System
,	O
OS/2	B-Application
,	O
AIX	B-Application
,	O
Windows	O
(	O
2000	O
,	O
XP	O
,	O
2003	O
)	O
,	O
Linux	B-Application
,	O
and	O
Mac	B-Operating_System
OS/X	I-Operating_System
are	O
available	O
online	O
.	O
</s>
<s>
The	O
following	O
JCL	O
can	O
be	O
used	O
to	O
invoke	O
AMATERSE	O
on	O
z/OS	B-Application
(	O
TRSMAIN	O
uses	O
INFILE	O
and	O
OUTFILE	O
instead	O
of	O
SYSUT1	O
and	O
SYSUT2	O
)	O
:	O
</s>
<s>
Terse	B-Application
can	O
be	O
used	O
as	O
a	O
general-purpose	O
compression/decompression	O
tool	O
.	O
</s>
<s>
Terse	B-Application
is	O
also	O
used	O
by	O
IBM	O
customers	O
to	O
package	O
diagnostic	O
information	O
such	O
as	O
z/OS	B-Application
dumps	O
and	O
traces	O
,	O
for	O
transmission	O
to	O
IBM	O
.	O
</s>
