<s>
A	O
frequency	B-Algorithm
band	I-Algorithm
is	O
an	O
interval	O
in	O
the	O
frequency	O
domain	O
,	O
delimited	O
by	O
a	O
lower	O
frequency	O
and	O
an	O
upper	O
frequency	O
.	O
</s>
<s>
The	O
term	O
may	O
refer	O
to	O
a	O
radio	B-Algorithm
band	I-Algorithm
(	O
such	O
as	O
wireless	O
communication	O
standards	O
set	O
by	O
the	O
International	O
Telecommunication	O
Union	O
)	O
or	O
an	O
interval	O
of	O
some	O
other	O
spectrum	O
.	O
</s>
<s>
The	O
electromagnetic	O
spectrum	O
can	O
be	O
divided	O
into	O
many	O
different	O
ranges	O
such	O
as	O
visible	O
light	O
,	O
infrared	O
or	O
ultraviolet	B-Application
radiation	O
,	O
radio	O
waves	O
,	O
X-rays	B-Library
and	O
so	O
on	O
,	O
and	O
each	O
of	O
these	O
ranges	O
can	O
in	O
turn	O
be	O
divided	O
into	O
smaller	O
ranges	O
.	O
</s>
<s>
A	O
radio	O
communications	O
signal	O
must	O
occupy	O
a	O
range	O
of	O
frequencies	O
carrying	O
most	O
of	O
its	O
energy	O
,	O
called	O
its	O
bandwidth	B-Algorithm
.	O
</s>
<s>
A	O
frequency	B-Algorithm
band	I-Algorithm
may	O
represent	O
one	O
communication	O
channel	O
or	O
be	O
subdivided	O
into	O
many	O
.	O
</s>
<s>
Allocation	O
of	O
radio	O
frequency	O
ranges	O
to	O
different	O
uses	O
is	O
a	O
major	O
function	O
of	O
radio	B-Algorithm
spectrum	I-Algorithm
allocation	I-Algorithm
.	O
</s>
