<s>
A	O
carriage	B-Device
control	I-Device
tape	I-Device
was	O
a	O
loop	O
of	O
punched	O
tape	O
that	O
was	O
used	O
to	O
synchronize	O
rapid	O
vertical	O
page	O
movement	O
in	O
most	O
IBM	O
and	O
many	O
other	O
line	O
printers	O
from	O
unit	O
record	O
days	O
through	O
the	O
1980	O
's	O
.	O
</s>
<s>
Newer	O
printers	O
use	O
a	O
"	O
forms	O
control	O
buffer	O
"	O
(	O
FCB	O
)	O
,	O
which	O
is	O
an	O
electronic	O
image	O
of	O
the	O
physical	O
carriage	B-Device
control	I-Device
tape	I-Device
.	O
</s>
