Many
different
types
of
bar
code
scanning
machines
exist
,
but
they
all
work
on
the
same
fundamental
principles
.
They
all
use
the
____________________
of
light
reflected
from
a
series
of
black
and
white
stripes
to
tell
a
computer
what
code
it
is
____________________
.
White
stripes
____________________
light
very
well
,
while
black
stripes
reflect
hardly
any
light
at
all
.
The
bar
code
scanner
shines
light
____________________
across
a
bar
code
,
simultaneously
detecting
and
recording
the
pattern
of
reflected
and
non
-
reflected
light
.
The
scanner
then
____________________
this
pattern
into
an
electrical
signal
____________________
the
computer
can
understand
.
All
scanners
must
include
computer
software
to
interpret
the
bar
code
once
it's
been
entered
.
This
simple
____________________
has
transformed
the
way
we
are
able
to
____________________
data
and
the
way
in
which
____________________
businesses
handle
recordkeeping
.
