Reviewing all that we have discussed concerning the specific subject of storage costs, we can make the following conclusions:

$ In view of future expectations, a reduction in housing cost is desirable.
$ The number of hours information per cubic metre of housing has to be increased.
$ The storage capacity of an information carrier should be increased if safe to do so.
$ The operational costs are, as far as we know, not related to the storage costs. It remains to be seen, however, if operational costs can be decreased when using another information carrier, taking into account the special operational aspects, such as user-friendly facilities.