
96-1
96.1 Introduction
e heart of recording technology is for the process of information storage and retrieval. In addition to
its obvious importance in dierent branches of science and engineering, it has become indispensable
to ou
r
da
ily
li
fe
. Wh
en
we ma
ke
a ba
nk
tr
ansaction,
re
serve
an ai
rplane
ti
cket,
us
e
a cr
edit
ca
rd,
wa
tch
a mo
vie
fr
om
a vi
deo
ta
pe,
or li
sten
to mu
sic
fr
om
a CD
,
we ar
e
usi
ng
th
e
te
chnology
of re
cording
. e
ge
neral
re
quirements
fo
r
re
cording
ar
e
in
formation
in
tegrity,
fa
st
ac
cess,
an
d
lo
w
co
st
. Am
ong
th
e
di
f-
ferent
t
echniques,
t
he
m
ost
p
opularly
u
sed
o
nes
a
re
m
agnetic
a
nd
o
ptical
r
ecording
.
Ty
pical
re
cording
eq
uipment