<s>
The	O
Algorithm	B-Algorithm
BSTW	I-Algorithm
is	O
a	O
data	B-General_Concept
compression	I-General_Concept
algorithm	I-General_Concept
,	O
named	O
after	O
its	O
designers	O
,	O
Bentley	O
,	O
Sleator	O
,	O
Tarjan	O
and	O
Wei	O
in	O
1986	O
.	O
</s>
<s>
BSTW	B-Algorithm
is	O
a	O
dictionary-based	O
algorithm	O
that	O
uses	O
a	O
move-to-front	B-Algorithm
transform	I-Algorithm
to	O
keep	O
recently	O
seen	O
dictionary	O
entries	O
at	O
the	O
front	O
of	O
the	O
dictionary	O
.	O
</s>
<s>
Dictionary	O
references	O
are	O
then	O
encoded	O
using	O
any	O
of	O
a	O
number	O
of	O
encoding	O
methods	O
,	O
usually	O
Elias	B-Algorithm
delta	I-Algorithm
coding	I-Algorithm
or	O
Elias	B-Algorithm
gamma	I-Algorithm
coding	I-Algorithm
.	O
</s>
