1
.
Terminal
maintenance
involves
updating
merchant
and
terminal
information
in
____________________
____________________
____________________
.
2
.
A
terminal
,
or
point
of
sale
(
POS
)
,
is
a
____________________
____________________
used
by
the
merchant
to
process
payment
transactions
.
3
.
Terminal
maintenance
ensures
that
payment
transactions
run
smoothly
for
the
____________________
.