<s>
A	O
field	B-Language
specification	I-Language
or	O
fspec	B-Language
defines	O
a	O
portion	O
of	O
a	O
word	O
in	O
some	O
programming	O
language	O
.	O
</s>
<s>
It	O
has	O
the	O
form	O
"	O
(	O
L:R	O
)	O
"	O
where	O
"	O
L	O
"	O
is	O
the	O
leftmost	O
byte	B-Application
and	O
"	O
R	O
"	O
is	O
the	O
rightmost	O
byte	B-Application
,	O
and	O
counting	O
begins	O
at	O
zero	O
.	O
</s>
<s>
For	O
example	O
,	O
the	O
first	O
three	O
bytes	B-Application
of	O
a	O
word	O
would	O
have	O
the	O
fspec	B-Language
(	O
0:2	O
)	O
for	O
bytes	B-Application
numbered	O
0	O
,	O
1	O
,	O
and	O
2	O
.	O
</s>
